|
|
<!DOCTYPE html>
|
|
|
<html lang="en-US">
|
|
|
<head>
|
|
|
<meta charset="utf-8">
|
|
|
<meta name="viewport" content="width=device-width,initial-scale=1">
|
|
|
<meta name="generator" content="VuePress 2.0.0-beta.51">
|
|
|
<style>
|
|
|
:root {
|
|
|
--c-bg: #fff;
|
|
|
}
|
|
|
html.dark {
|
|
|
--c-bg: #22272e;
|
|
|
}
|
|
|
html, body {
|
|
|
background-color: var(--c-bg);
|
|
|
}
|
|
|
</style>
|
|
|
<script>
|
|
|
const userMode = localStorage.getItem('vuepress-color-scheme');
|
|
|
const systemDarkMode = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
|
|
|
if (userMode === 'dark' || (userMode !== 'light' && systemDarkMode)) {
|
|
|
document.documentElement.classList.toggle('dark', true);
|
|
|
}
|
|
|
</script>
|
|
|
<link rel="icon" href="/images/favicon.ico"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta property="og:title" content="Arthas"><meta property="og:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image" content="/images/arthas_mate_image.png"><meta property="og:description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image:width" content="1200"><meta property="og:image:height" content="600"><meta property="twitter:image:src" content="/images/arthas_mate_image.png"><meta property="twitter:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta itemprop="name" content="Arthas"><meta itemprop="image" content="/images/arthas_mate_image.png"><meta itemprop="description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><script>
|
|
|
var _hmt = _hmt || [];
|
|
|
(function() {
|
|
|
var hm = document.createElement("script");
|
|
|
hm.src = "https://hm.baidu.com/hm.js?d5c5e25b100f0eb51a4c35c8a86ea9b4";
|
|
|
var s = document.getElementsByTagName("script")[0];
|
|
|
s.parentNode.insertBefore(hm, s);
|
|
|
})();
|
|
|
</script><meta name="aes-config" content="pid=xux-opensource&user_type=101&uid=&username="><script src="//g.alicdn.com/alilog/mlog/aplus_v2.js" id="beacon-aplus" exparams="clog=o&aplus&sidx=aplusSidx&ckx=aplusCkx"></script><script src="//g.alicdn.com/aes/??tracker/1.0.34/index.js,tracker-plugin-pv/2.4.5/index.js,tracker-plugin-event/1.2.5/index.js,tracker-plugin-jserror/1.0.13/index.js,tracker-plugin-api/1.1.14/index.js,tracker-plugin-perf/1.1.8/index.js,tracker-plugin-eventTiming/1.0.4/index.js"></script><title>watch | arthas</title><meta name="description" content="arthas user document">
|
|
|
<link rel="modulepreload" href="/assets/app.a799ec6e.js"><link rel="modulepreload" href="/assets/watch.html.7a2095ad.js"><link rel="modulepreload" href="/assets/watch.html.63b5ba23.js"><link rel="prefetch" href="/assets/index.html.fc6fe773.js"><link rel="prefetch" href="/assets/index.html.303ae9ec.js"><link rel="prefetch" href="/assets/index.html.ad417e2a.js"><link rel="prefetch" href="/assets/advanced-use.html.11577830.js"><link rel="prefetch" href="/assets/advice-class.html.30be8b5c.js"><link rel="prefetch" href="/assets/agent.html.478e63bb.js"><link rel="prefetch" href="/assets/arthas-properties.html.e3240fdd.js"><link rel="prefetch" href="/assets/arthas3.html.76d57c12.js"><link rel="prefetch" href="/assets/async.html.45f0f3b0.js"><link rel="prefetch" href="/assets/auth.html.f3cff3ae.js"><link rel="prefetch" href="/assets/base64.html.4ec57369.js"><link rel="prefetch" href="/assets/batch-support.html.b4aede0e.js"><link rel="prefetch" href="/assets/cat.html.8fd88644.js"><link rel="prefetch" href="/assets/classloader.html.7186247e.js"><link rel="prefetch" href="/assets/cls.html.3d057407.js"><link rel="prefetch" href="/assets/commands.html.693fbebe.js"><link rel="prefetch" href="/assets/contact-us.html.20195493.js"><link rel="prefetch" href="/assets/dashboard.html.209e0bb6.js"><link rel="prefetch" href="/assets/docker.html.a0eb05f5.js"><link rel="prefetch" href="/assets/download.html.2deec3fd.js"><link rel="prefetch" href="/assets/dump.html.50ddfd6c.js"><link rel="prefetch" href="/assets/echo.html.a1f5ce8f.js"><link rel="prefetch" href="/assets/faq.html.3fd76b41.js"><link rel="prefetch" href="/assets/getstatic.html.27112680.js"><link rel="prefetch" href="/assets/grep.html.dacb4fa0.js"><link rel="prefetch" href="/assets/groovy.html.f09fc852.js"><link rel="prefetch" href="/assets/heapdump.html.9a327e6e.js"><link rel="prefetch" href="/assets/help.html.e5e91b23.js"><link rel="prefetch" href="/assets/history.html.c2319956.js"><link rel="prefetch" href="/assets/http-api.html.340272fb.js"><link rel="prefetch" href="/assets/idea-plugin.html.fa691dc4.js"><link rel="prefetch" href="/assets/install-detail.html.3ad5b48c.js"><link rel="prefetch" href="/assets/jad.html.b439ea1a.js"><link rel="prefetch" href="/assets/jfr.html.a3b2ba6e.js"><link rel="prefetch" href="/assets/jvm.html.cf096739.js"><link rel="prefetch" href="/assets/keymap.html.a01789a5.js"><link rel="prefetch" href="/assets/logger.html.d03a8f0c.js"><link rel="prefetch" href="/assets/manual-install.html.9f2269f2.js"><link rel="prefetch" href="/assets/mbean.html.6c96833e.js"><link rel="prefetch" href="/assets/mc.html.255cc69c.js"><link rel="prefetch" href="/assets/memory.html.e3662077.js"><link rel="prefetch" href="/assets/monitor.html.bbbe19cc.js"><link rel="prefetch" href="/assets/ognl.html.3a3047a0.js"><link rel="prefetch" href="/assets/options.html.cd16814d.js"><link rel="prefetch" href="/assets/perfcounter.html.0a700f02.js"><link rel="prefetch" href="/assets/profiler.html.936fa1a4.js"><link rel="prefetch" href="/assets/pwd.html.ba33c545.js"><link rel="prefetch" href="/assets/quick-start.html.198ba0e7.js"><link rel="prefetch" href="/assets/quit.html.7ac530c1.js"><link rel="prefetch" href="/assets/redefine.html.ffb1192e.js"><link rel="prefetch" href="/assets/release-notes.html.1d8a3dd4.js"><link rel="prefetch" href="/assets/reset.html.a5e22012.js"><link rel="prefetch" href="/assets/retransform.html.c64149ae.js"><link rel="prefetch" href="/assets/save-log.html.2afe45b4.js"><link rel="prefetch" href="/assets/sc.html.247dcf9f.js"><link rel="prefetch" href="/assets/session.html.c7900924.js"><link rel="prefetch" href="/assets/sm.html.41f4be43.js"><link rel="prefetch" href="/assets/spring-boot-starter.html.55ed5500.js"><link rel="prefetch" href="/assets/stack.html.4879f051.js"><link rel="prefetch" href="/assets/start-arthas.html.f76a5b27.js"><link rel="prefetch" href="/assets/stop.html.b66bc06b.js"><link rel="prefetch" href="/assets/sysenv.html.cdb5ad58.js"><link rel="prefetch" href="/assets/sysprop.html.cf8f14e1.js"><link rel="prefetch" href="/assets/tee.html.7417e879.js"><link rel="prefetch" href="/assets/thread.html.26a331f7.js"><link rel="prefetch" href="/assets/trace.html.c411f6e4.js"><link rel="prefetch" href="/assets/tt.html.a10b37a5.js"><link rel="prefetch" href="/assets/tunnel.html.39939d69.js"><link rel="prefetch" href="/assets/version.html.fcef3325.js"><link rel="prefetch" href="/assets/vmoption.html.07e4d516.js"><link rel="prefetch" href="/assets/vmtool.html.1463d5ed.js"><link rel="prefetch" href="/assets/watch.html.9f3979d6.js"><link rel="prefetch" href="/assets/web-console.html.30324924.js"><link rel="prefetch" href="/assets/index.html.d9342172.js"><link rel="prefetch" href="/assets/advanced-use.html.051ef43d.js"><link rel="prefetch" href="/assets/advice-class.html.9d6f4ead.js"><link rel="prefetch" href="/assets/agent.html.fc481449.js"><link rel="prefetch" href="/assets/arthas-properties.html.855f5467.js"><link rel="prefetch" href="/assets/async.html.a651c93f.js"><link rel="prefetch" href="/assets/auth.html.f12f8b83.js"><link rel="prefetch" href="/assets/base64.html.f6b6c09b.js"><link rel="prefetch" href="/assets/batch-support.html.77744898.js"><link rel="prefetch" href="/assets/cat.html.67bee31a.js"><link rel="prefetch" href="/assets/classloader.html.73ec726e.js"><link rel="prefetch" href="/assets/cls.html.13c6acad.js"><link rel="prefetch" href="/assets/commands.html.bc0297db.js"><link rel="prefetch" href="/assets/contact-us.html.cf48697e.js"><link rel="prefetch" href="/assets/dashboard.html.89effd10.js"><link rel="prefetch" href="/assets/docker.html.c4150104.js"><link rel="prefetch" href="/assets/download.html.4a9305f6.js"><link rel="prefetch" href="/assets/dump.html.fce2f069.js"><link rel="prefetch" href="/assets/echo.html.64b1c026.js"><link rel="prefetch" href="/assets/faq.html.b01e64e2.js"><link rel="prefetch" href="/assets/getstatic.html.9f306af3.js"><link rel="prefetch" href="/assets/grep.html.f3dbfef3.js"><link rel="prefetch" href="/assets/groovy.html.ad6a24c1.js"><link rel="prefetch" href="/assets/heapdump.html.aeb001bb.js"><link rel="prefetch" href="/assets/help.html.e3621e60.js"><link rel="prefetch" href="/assets/history.html.e7f9db48.js"><link rel="prefetch" href="/assets/http-api.html.ca32150e.js"><link rel="prefetch" href="/assets/idea-plugin.html.217259ff.js"><link rel="prefetch" href="/assets/install-detail.html.35cac770.js"><link rel="prefetch" href="/assets/jad.html.4be767cc.js"><link rel="prefetch" href="/assets/jfr.html.1ef67ebe.js"><link rel="prefetch" href="/assets/jvm.html.7ac00554.js"><link rel="prefetch" href="/assets/keymap.html.8abf031d.js"><link rel="prefetch" href="/assets/logger.html.038d4761.js"><link rel="prefetch" href="/assets/manual-install.html.22cded4a.js"><link rel="prefetch" href="/assets/mbean.html.001b4846.js"><link rel="prefetch" href="/assets/mc.html.89c9bf50.js"><link rel="prefetch" href="/assets/memory.html.4d8f2fe3.js"><link rel="prefetch" href="/assets/monitor.html.54e7ab1f.js"><link rel="prefetch" href="/assets/ognl.html.4c893825.js"><link rel="prefetch" href="/assets/options.html.e6df4b92.js"><link rel="prefetch" href="/assets/perfcounter.html.30a8d0a7.js"><link rel="prefetch" href="/assets/profiler.html.dc04bfe3.js"><link rel="prefetch" href="/assets/pwd.html.d3599c6b.js"><link rel="prefetch" href="/assets/quick-start.html.4efab2b0.js"><link rel="prefetch" href="/assets/quit.html.0a5d93f7.js"><link rel="prefetch" href="/assets/redefine.html.139c21bd.js"><link rel="prefetch" href="/assets/release-notes.html.fd245696.js"><link rel="prefetch" href="/assets/reset.html.ef6c4c63.js"><link rel="prefetch" href="/assets/retransform.html.ea309c3c.js"><link rel="prefetch" href="/assets/save-log.html.4ad86b78.js"><link rel="prefetch" href="/assets/sc.html.77c0e9ae.js"><link rel="prefetch" href="/assets/session.html.30971a36.js"><link rel="prefetch" href="/assets/sm.html.c7f72499.js"><link rel="prefetch" href="/assets/spring-boot-starter.html.b1022a52.js"><link rel="prefetch" href="/assets/stack.html.b65becdf.js"><link rel="prefetch" href="/assets/start-arthas.html.3a80ff7a.js"><link rel="prefetch" href="/assets/stop.html.25331411.js"><link rel="prefetch" href="/assets/sysenv.html.c98722b1.js"><link rel="prefetch" href="/assets/sysprop.html.dedbdbee.js"><link rel="prefetch" href="/assets/tee.html.6b9b89e6.js"><link rel="prefetch" href="/assets/thread.html.45b25f48.js"><link rel="prefetch" href="/assets/trace.html.90f60e0d.js"><link rel="prefetch" href="/assets/tt.html.197b0268.js"><link rel="prefetch" href="/assets/tunnel.html.15d0a3a2.js"><link rel="prefetch" href="/assets/version.html.d4b4ce52.js"><link rel="prefetch" href="/assets/vmoption.html.85550501.js"><link rel="prefetch" href="/assets/vmtool.html.302132c9.js"><link rel="prefetch" href="/assets/web-console.html.133aa998.js"><link rel="prefetch" href="/assets/404.html.e1130832.js"><link rel="prefetch" href="/assets/index.html.d99628ae.js"><link rel="prefetch" href="/assets/index.html.a97f8a7f.js"><link rel="prefetch" href="/assets/index.html.5cca3e1d.js"><link rel="prefetch" href="/assets/advanced-use.html.438b701e.js"><link rel="prefetch" href="/assets/advice-class.html.b31d4407.js"><link rel="prefetch" href="/assets/agent.html.5041e952.js"><link rel="prefetch" href="/assets/arthas-properties.html.7e4f29c4.js"><link rel="prefetch" href="/assets/arthas3.html.9daf5c05.js"><link rel="prefetch" href="/assets/async.html.d6337c5c.js"><link rel="prefetch" href="/assets/auth.html.39732527.js"><link rel="prefetch" href="/assets/base64.html.d67e6aaf.js"><link rel="prefetch" href="/assets/batch-support.html.ba1e297d.js"><link rel="prefetch" href="/assets/cat.html.7d47724f.js"><link rel="prefetch" href="/assets/classloader.html.a4f7484a.js"><link rel="prefetch" href="/assets/cls.html.8661b40c.js"><link rel="prefetch" href="/assets/commands.html.4d2f8cfd.js"><link rel="prefetch" href="/assets/contact-us.html.6383f8f5.js"><link rel="prefetch" href="/assets/dashboard.html.aa7807b7.js"><link rel="prefetch" href="/assets/docker.html.3ce6c504.js"><link rel="prefetch" href="/assets/download.html.b77a2dd2.js"><link rel="prefetch" href="/assets/dump.html.af3c9073.js"><link rel="prefetch" href="/assets/echo.html.cb0df2fe.js"><link rel="prefetch" href="/assets/faq.html.86bd48fe.js"><link rel="prefetch" href="/assets/getstatic.html.fa248b28.js"><link rel="prefetch" href="/assets/grep.html.7c0a8c9e.js"><link rel="prefetch" href="/assets/groovy.html.ace36bfd.js"><link rel="prefetch" href="/assets/heapdump.html.a7d81965.js"><link rel="prefetch" href="/assets/help.html.b701a9ca.js"><link rel="prefetch" href="/assets/history.html.6b379338.js"><link rel="prefetch" href="/assets/http-api.html.5f549187.js"><link rel="prefetch" href="/assets/idea-plugin.html.d3e21d67.js"><link rel="prefetch" href="/assets/install-detail.html.b3a01147.js"><link rel="prefetch" href="/assets/jad.html.cfa2a34c.js"><link rel="prefetch" href="/assets/jfr.html.4c50a37d.js"><link rel="prefetch" href="/assets/jvm.html.7b80e1fd.js"><link rel="prefetch" href="/assets/keymap.html.cb9e39f1.js"><link rel="prefetch" href="/assets/logger.html.8333a576.js"><link rel="prefetch" href="/assets/manual-install.html.28c47a10.js"><link rel="prefetch" href="/assets/mbean.html.2451611b.js"><link rel="prefetch" href="/assets/mc.html.64ebf946.js"><link rel="prefetch" href="/assets/memory.html.a0a1a5db.js"><link rel="prefetch" href="/assets/monitor.html.056e7ecd.js"><link rel="prefetch" href="/assets/ognl.html.e9a16e44.js"><link rel="prefetch" href="/assets/options.html.015983a2.js"><link rel="prefetch" href="/assets/perfcounter.html.610f7e51.js"><link rel="prefetch" href="/assets/profiler.html.e36e08af.js"><link rel="prefetch" href="/assets/pwd.html.e28dc5d2.js"><link rel="prefetch" href="/assets/quick-start.html.988d9019.js"><link rel="prefetch" href="/assets/quit.html.bab42bb4.js"><link rel="prefetch" href="/assets/redefine.html.b3a8b957.js"><link rel="prefetch" href="/assets/release-notes.html.82c79cf7.js"><link rel="prefetch" href="/assets/reset.html.cd6ff912.js"><link rel="prefetch" href="/assets/retransform.html.5dcc1ae1.js"><link rel="prefetch" href="/assets/save-log.html.a076179e.js"><link rel="prefetch" href="/assets/sc.html.23e39f46.js"><link rel="prefetch" href="/assets/session.html.996fb8d1.js"><link rel="prefetch" href="/assets/sm.html.c531120a.js"><link rel="prefetch" href="/assets/spring-boot-starter.html.cdf3d4bb.js"><link rel="prefetch" href="/assets/stack.html.a652a306.js"><link rel="prefetch" href="/assets/start-arthas.html.9e5f58fd.js"><link rel="prefetch" href="/assets/stop.html.025ccbac.js"><link rel="prefetch" href="/assets/sysenv.html.14c61e0b.js"><link rel="prefetch" href="/assets/sysprop.html.0a6f67b9.js"><link rel="prefetch" href="/assets/tee.html.61387527.js"><link rel="prefetch" href="/assets/thread.html.108722be.js"><link rel="prefetch" href="/assets/trace.html.91e421fe.js"><link rel="prefetch" href="/assets/tt.html.16dfe85d.js"><link rel="prefetch" href="/assets/tunnel.html.984926d6.js"><link rel="prefetch" href="/assets/version.html.a730fb73.js"><link rel="prefetch" href="/assets/vmoption.html.8cebc608.js"><link rel="prefetch" href="/assets/vmtool.html.da4d3724.js"><link rel="prefetch" href="/assets/watch.html.2fab45a4.js"><link rel="prefetch" href="/assets/web-console.html.adfb6d8d.js"><link rel="prefetch" href="/assets/index.html.0eb938ef.js"><link rel="prefetch" href="/assets/advanced-use.html.5ef1b804.js"><link rel="prefetch" href="/assets/advice-class.html.039b2153.js"><link rel="prefetch" href="/assets/agent.html.0b488870.js"><link rel="prefetch" href="/assets/arthas-properties.html.19773e87.js"><link rel="prefetch" href="/assets/async.html.6bb78833.js"><link rel="prefetch" href="/assets/auth.html.3eb814e7.js"><link rel="prefetch" href="/assets/base64.html.b80038f4.js"><link rel="prefetch" href="/assets/batch-support.html.0b849a62.js"><link rel="prefetch" href="/assets/cat.html.2af59359.js"><link rel="prefetch" href="/assets/classloader.html.0358ea40.js"><link rel="prefetch" href="/assets/cls.html.12aa3a8b.js"><link rel="prefetch" href="/assets/commands.html.5d15b0c4.js"><link rel="prefetch" href="/assets/contact-us.html.86b4a63e.js"><link rel="prefetch" href="/assets/dashboard.html.d2d2cd08.js"><link rel="prefetch" href="/assets/docker.html.602f80ac.js"><link rel="prefetch" href="/assets/download.html.05bf0f40.js"><link rel="prefetch" href="/assets/dump.html.cc2e7ecb.js"><link rel="prefetch" href="/assets/echo.html.aa14deba.js"><link rel="prefetch" href="/assets/faq.html.40dcbc7d.js"><link rel="prefetch" href="/assets/getstatic.html.e3a8a085.js"><link rel="prefetch" href="/assets/grep.html.7982a303.js"><link rel="prefetch" href="/assets/groovy.html.5082bde9.js"><link rel="prefetch" href="/assets/heapdump.html.3bc31a38.js"><link rel="prefetch" href="/assets/help.html.1622223c.js"><link rel="prefetch" href="/assets/history.html.4dce9efe.js"><link rel="prefetch" href="/assets/http-api.html.64ed6d6d.js"><link rel="prefetch" href="/assets/idea-plugin.html.29a62808.js"><link rel="prefetch" href="/assets/install-detail.html.dcb4060c.js"><link rel="prefetch" href="/assets/jad.html.57bbc3b6.js"><link rel="prefetch" href="/assets/jfr.html.1e6ab7dc.js"><link rel="prefetch" href="/assets/jvm.html.6e2eddee.js"><link rel="prefetch" href="/assets/keymap.html.69b5237c.js"><link rel="prefetch" href="/assets/logger.html.04d01e29.js"><link rel="prefetch" href="/assets/manual-install.html.144faef9.js"><link rel="prefetch" href="/assets/mbean.html.560b0a43.js"><link rel="prefetch" href="/assets/mc.html.249c7890.js"><link rel="prefetch" href="/assets/memory.html.e48180be.js"><link rel="prefetch" href="/assets/monitor.html.446758fe.js"><link rel="prefetch" href="/assets/ognl.html.c4af2780.js"><link rel="prefetch" href="/assets/options.html.2262c611.js"><link rel="prefetch" href="/assets/perfcounter.html.34b3de70.js"><link rel="prefetch" href="/assets/profiler.html.e7539faf.js"><link rel="prefetch" href="/assets/pwd.html.4182d2cc.js"><link rel="prefetch" href="/assets/quick-start.html.cc53c88b.js"><link rel="prefetch" href="/assets/quit.html.652a6f42.js"><link rel="prefetch" href="/assets/redefine.html.00c1272b.js"><link rel="prefetch" href="/assets/release-notes.html.0ed778da.js"><link rel="prefetch" href="/assets/reset.html.46363fda.js"><link rel="prefetch" href="/assets/retransform.html.8fe16f21.js"><link rel="prefetch" href="/assets/save-log.html.2f8436b8.js"><link rel="prefetch" href="/assets/sc.html.78dfaeb7.js"><link rel="prefetch" href="/assets/session.html.65adba08.js"><link rel="prefetch" href="/assets/sm.html.cb2e8457.js"><link rel="prefetch" href="/assets/spring-boot-starter.html.5e5c761a.js"><link rel="prefetch" href="/assets/stack.html.954ad94e.js"><link rel="prefetch" href="/assets/start-arthas.html.4e010140.js"><link rel="prefetch" href="/assets/stop.html.1d39af2d.js"><link rel="prefetch" href="/assets/sysenv.html.2bf4eb76.js"><link rel="prefetch" href="/assets/sysprop.html.cc9ea3c4.js"><link rel="prefetch" href="/assets/tee.html.6b54b926.js"><link rel="prefetch" href="/assets/thread.html.634d2c11.js"><link rel="prefetch" href="/assets/trace.html.18407f38.js"><link rel="prefetch" href="/assets/tt.html.4cb5fbbe.js"><link rel="prefetch" href="/assets/tunnel.html.3bd92224.js"><link rel="prefetch" href="/assets/version.html.614004b4.js"><link rel="prefetch" href="/assets/vmoption.html.ca0fb06f.js"><link rel="prefetch" href="/assets/vmtool.html.e438eefc.js"><link rel="prefetch" href="/assets/web-console.html.108435da.js"><link rel="prefetch" href="/assets/404.html.1d23c731.js">
|
|
|
<link rel="stylesheet" href="/assets/style.da1934a3.css">
|
|
|
</head>
|
|
|
<body>
|
|
|
<div id="app"><!--[--><div class="theme-container"><!--[--><header class="navbar"><div class="toggle-sidebar-button" title="toggle sidebar" aria-expanded="false" role="button" tabindex="0"><div class="icon" aria-hidden="true"><span></span><span></span><span></span></div></div><span><a href="/en/" class="" data-v-61144abc><!----><span class="site-name can-hide" data-v-61144abc>arthas</span><span class="navbar-version" data-v-61144abc>v3.6.5</span></a></span><div class="navbar-items-wrapper" style=""><!--[--><!--]--><nav class="navbar-items can-hide"><!--[--><div class="navbar-item"><a href="/en/" class="" aria-label="HOME"><!--[--><!--]--> HOME <!--[--><!--]--></a></div><div class="navbar-item"><a class="external-link" href="/doc/arthas-tutorials.html?language=en&id=arthas-basics" rel="noopener noreferrer" target="_blank" aria-label="ONLINE TUTORIALS"><!--[--><!--]--><span>ONLINE TUTORIALS</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc" class="router-link-active" aria-label="DOCS"><!--[--><!--]--> DOCS <!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc/commands.md" class="" aria-label="COMMANDS"><!--[--><!--]--> COMMANDS <!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc/download.md" class="" aria-label="DOWNLOAD"><!--[--><!--]--> DOWNLOAD <!--[--><!--]--></a></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="SOLUTIONS"><span class="title">SOLUTIONS</span><span class="arrow down"></span></button><button class="navbar-dropdown-title-mobile" type="button" aria-label="SOLUTIONS"><span class="title">SOLUTIONS</span><span class="right arrow"></span></button><ul style="display:none;" class="navbar-dropdown"><!--[--><li class="navbar-dropdown-item"><a class="external-link" href="https://cn.aliyun.com/product/aliware/mse?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Microservice solutions"><!--[--><!--]--><span>Microservice solutions</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/aliware/txc?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Distributed transaction solutions"><!--[--><!--]--><span>Distributed transaction solutions</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/ahas?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="High-availability solution"><!--[--><!--]--><span>High-availability solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://cn.aliyun.com/product/aliware/sae?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Serverless solution for miscoservices"><!--[--><!--]--><span>Serverless solution for miscoservices</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/edas?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="PaaS solution"><!--[--><!--]--><span>PaaS solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/servicemesh?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Service mesh solution"><!--[--><!--]--><span>Service mesh solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><!--]--></ul></div></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="Select language"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1em" height="1em" style="height:1.25rem;width:1.25rem;vertical-align:bottom;" viewbox="0 0 24 24"><path fill="currentColor" d="M13.35 22q-.6 0-.862-.387q-.263-.388-.063-.963l3.65-9.675q.15-.4.563-.688Q17.05 10 17.5 10q.425 0 .85.287q.425.288.575.688l3.65 9.675q.2.575-.062.963q-.263.387-.888.387q-.275 0-.5-.175q-.225-.175-.325-.425l-.85-2.45H15.1l-.875 2.45q-.1.25-.35.425q-.25.175-.525.175Zm2.35-4.8h3.6l-1.75-4.95h-.1ZM7.15 8.55q.4.725.85 1.337q.45.613 1.05 1.263q1.1-1.2 1.825-2.462Q11.6 7.425 12.1 6H2q-.425 0-.712-.287Q1 5.425 1 5t.288-.713Q1.575 4 2 4h6V3q0-.425.288-.713Q8.575 2 9 2t.713.287Q10 2.575 10 3v1h6q.425 0 .712.287Q17 4.575 17 5t-.288.713Q16.425 6 16 6h-1.9q-.525 1.775-1.425 3.45q-.9 1.675-2.225 3.15l2.4 2.45l-.75 2.05L9 14l-4.3 4.3q-.275.275-.7.275q-.425 0-.7-.275q-.275-.275-.275-.7q0-.425.275-.7l4.35-4.35q-.675-.775-1.25-1.563q-.575-.787-1.025-1.662Q5.1 8.8 5.35 8.4t.875-.4q.25 0 .525.162q.275.163.4.388Z"></path></svg><span class="arrow down"></span></button><button class="navbar-dropdown-title-mobile" type="button" aria-label="Select language"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1em" height="1em" style="height:1.25rem;width:1.25rem;vertical-align:bottom;" viewbox="0 0 24 24"><path fill="currentColor" d="M13.35 22q-.6 0-.862-.387q-.263-.388-.063-.963l3.65-9.675q.15-.4.563-.688Q17.05 10 17.5 10q.425 0 .85.287q.425.288.575.688l3.65 9.675q.2.575-.062.963q-.263.387-.888.387q-.275 0-.5-.175q-.225-.175-.325-.425l-.85-2.45H15.1l-.875 2.45q-.1.25-.35.425q-.25.175-.525.175Zm2.35-4.8h3.6l-1.75-4.95h-.1ZM7.15 8.55q.4.725.85 1.337q.45.613 1.05 1.263q1.1-1.2 1.825-2.462Q11.6 7.425 12.1 6H2q-.425 0-.712-.287Q1 5.425 1 5t.288-.713Q1.575 4 2 4h6V3q0-.425.288-.713Q8.575 2 9 2t.713.287Q10 2.575 10 3v1h6q.425 0 .712.287Q17 4.575 17 5t-.288.713Q16.425 6 16 6h-1.9q-.525 1.775-1.425 3.45q-.9 1.675-2.225 3.15l2.4 2.45l-.75 2.05L9 14l-4.3 4.3q-.275.275-.7.275q-.425 0-.7-.275q-.275-.275-.275-.7q0-.425.275-.7l4.35-4.35q-.675-.775-1.25-1.563q-.575-.787-1.025-1.662Q5.1 8.8 5.35 8.4t.875-.4q.25 0 .525.162q.275.163.4.388Z"></path></svg><span class="right arrow"></span></button><ul style="display:none;" class="navbar-dropdown"><!--[--><li class="navbar-dropdown-item"><a href="/doc/watch.html" class="" aria-label="简体中文"><!--[--><!--]--> 简体中文 <!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a aria-current="page" href="/en/doc/watch.html" class="router-link-active router-link-exact-active router-link-active" aria-label="English"><!--[--><!--]--> English <!--[--><!--]--></a></li><!--]--></ul></div></div><div class="navbar-item"><a class="external-link" href="https://github.com/alibaba/arthas" rel="noopener noreferrer" target="_blank" aria-label="GitHub"><!--[--><!--]--><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewbox="0 0 24 24" style="height:1.25rem;width:1.25rem;vertical-align:bottom;"><path fill="currentColor" d="M12 2A10 10 0 0 0 2 12c0 4.42 2.87 8.17 6.84 9.5c.5.08.66-.23.66-.5v-1.69c-2.77.6-3.36-1.34-3.36-1.34c-.46-1.16-1.11-1.47-1.11-1.47c-.91-.62.07-.6.07-.6c1 .07 1.53 1.03 1.53 1.03c.87 1.52 2.34 1.07 2.91.83c.09-.65.35-1.09.63-1.34c-2.22-.25-4.55-1.11-4.55-4.92c0-1.11.38-2 1.03-2.71c-.1-.25-.45-1.29.1-2.64c0 0 .84-.27 2.75 1.02c.79-.22 1.65-.33 2.5-.33c.85 0 1.71.11 2.5.33c1.91-1.29 2.75-1.02 2.75-1.02c.55 1.35.2 2.39.1 2.64c.65.71 1.03 1.6 1.03 2.71c0 3.82-2.34 4.66-4.57 4.91c.36.31.69.92.69 1.85V21c0 .27.16.59.67.5C19.14 20.16 22 16.42 22 12A10 10 0 0 0 12 2Z"></path></svg><!----><!--[--><!--]--></a></div><!--]--></nav><!--[--><!--]--><button class="toggle-color-mode-button" title="toggle color mode"><svg style="" class="icon" focusable="false" viewBox="0 0 32 32"><path d="M16 12.005a4 4 0 1 1-4 4a4.005 4.005 0 0 1 4-4m0-2a6 6 0 1 0 6 6a6 6 0 0 0-6-6z" fill="currentColor"></path><path d="M5.394 6.813l1.414-1.415l3.506 3.506L8.9 10.318z" fill="currentColor"></path><path d="M2 15.005h5v2H2z" fill="currentColor"></path><path d="M5.394 25.197L8.9 21.691l1.414 1.415l-3.506 3.505z" fill="currentColor"></path><path d="M15 25.005h2v5h-2z" fill="currentColor"></path><path d="M21.687 23.106l1.414-1.415l3.506 3.506l-1.414 1.414z" fill="currentColor"></path><path d="M25 15.005h5v2h-5z" fill="currentColor"></path><path d="M21.687 8.904l3.506-3.506l1.414 1.415l-3.506 3.505z" fill="currentColor"></path><path d="M15 2.005h2v5h-2z" fill="currentColor"></path></svg><svg style="display:none;" class="icon" focusable="false" viewBox="0 0 32 32"><path d="M13.502 5.414a15.075 15.075 0 0 0 11.594 18.194a11.113 11.113 0 0 1-7.975 3.39c-.138 0-.278.005-.418 0a11.094 11.094 0 0 1-3.2-21.584M14.98 3a1.002 1.002 0 0 0-.175.016a13.096 13.096 0 0 0 1.825 25.981c.164.006.328 0 .49 0a13.072 13.072 0 0 0 10.703-5.555a1.01 1.01 0 0 0-.783-1.565A13.08 13.08 0 0 1 15.89 4.38A1.015 1.015 0 0 0 14.98 3z" fill="currentColor"></path></svg></button><div id="docsearch-container"></div></div></header><!--]--><div class="sidebar-mask"></div><!--[--><aside class="sidebar"><nav class="navbar-items"><!--[--><div class="navbar-item"><a href="/en/" class="" aria-label="HOME"><!--[--><!--]--> HOME <!--[--><!--]--></a></div><div class="navbar-item"><a class="external-link" href="/doc/arthas-tutorials.html?language=en&id=arthas-basics" rel="noopener noreferrer" target="_blank" aria-label="ONLINE TUTORIALS"><!--[--><!--]--><span>ONLINE TUTORIALS</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc" class="router-link-active" aria-label="DOCS"><!--[--><!--]--> DOCS <!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc/commands.md" class="" aria-label="COMMANDS"><!--[--><!--]--> COMMANDS <!--[--><!--]--></a></div><div class="navbar-item"><a href="/en/doc/download.md" class="" aria-label="DOWNLOAD"><!--[--><!--]--> DOWNLOAD <!--[--><!--]--></a></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="SOLUTIONS"><span class="title">SOLUTIONS</span><span class="arrow down"></span></button><button class="navbar-dropdown-title-mobile" type="button" aria-label="SOLUTIONS"><span class="title">SOLUTIONS</span><span class="right arrow"></span></button><ul style="display:none;" class="navbar-dropdown"><!--[--><li class="navbar-dropdown-item"><a class="external-link" href="https://cn.aliyun.com/product/aliware/mse?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Microservice solutions"><!--[--><!--]--><span>Microservice solutions</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/aliware/txc?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Distributed transaction solutions"><!--[--><!--]--><span>Distributed transaction solutions</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/ahas?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="High-availability solution"><!--[--><!--]--><span>High-availability solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://cn.aliyun.com/product/aliware/sae?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Serverless solution for miscoservices"><!--[--><!--]--><span>Serverless solution for miscoservices</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/edas?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="PaaS solution"><!--[--><!--]--><span>PaaS solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a class="external-link" href="https://www.aliyun.com/product/servicemesh?spm=arthas.topbar.0.0.0" rel="noopener noreferrer" target="_blank" aria-label="Service mesh solution"><!--[--><!--]--><span>Service mesh solution</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></li><!--]--></ul></div></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="Select language"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1em" height="1em" style="height:1.25rem;width:1.25rem;vertical-align:bottom;" viewbox="0 0 24 24"><path fill="currentColor" d="M13.35 22q-.6 0-.862-.387q-.263-.388-.063-.963l3.65-9.675q.15-.4.563-.688Q17.05 10 17.5 10q.425 0 .85.287q.425.288.575.688l3.65 9.675q.2.575-.062.963q-.263.387-.888.387q-.275 0-.5-.175q-.225-.175-.325-.425l-.85-2.45H15.1l-.875 2.45q-.1.25-.35.425q-.25.175-.525.175Zm2.35-4.8h3.6l-1.75-4.95h-.1ZM7.15 8.55q.4.725.85 1.337q.45.613 1.05 1.263q1.1-1.2 1.825-2.462Q11.6 7.425 12.1 6H2q-.425 0-.712-.287Q1 5.425 1 5t.288-.713Q1.575 4 2 4h6V3q0-.425.288-.713Q8.575 2 9 2t.713.287Q10 2.575 10 3v1h6q.425 0 .712.287Q17 4.575 17 5t-.288.713Q16.425 6 16 6h-1.9q-.525 1.775-1.425 3.45q-.9 1.675-2.225 3.15l2.4 2.45l-.75 2.05L9 14l-4.3 4.3q-.275.275-.7.275q-.425 0-.7-.275q-.275-.275-.275-.7q0-.425.275-.7l4.35-4.35q-.675-.775-1.25-1.563q-.575-.787-1.025-1.662Q5.1 8.8 5.35 8.4t.875-.4q.25 0 .525.162q.275.163.4.388Z"></path></svg><span class="arrow down"></span></button><button class="navbar-dropdown-title-mobile" type="button" aria-label="Select language"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1em" height="1em" style="height:1.25rem;width:1.25rem;vertical-align:bottom;" viewbox="0 0 24 24"><path fill="currentColor" d="M13.35 22q-.6 0-.862-.387q-.263-.388-.063-.963l3.65-9.675q.15-.4.563-.688Q17.05 10 17.5 10q.425 0 .85.287q.425.288.575.688l3.65 9.675q.2.575-.062.963q-.263.387-.888.387q-.275 0-.5-.175q-.225-.175-.325-.425l-.85-2.45H15.1l-.875 2.45q-.1.25-.35.425q-.25.175-.525.175Zm2.35-4.8h3.6l-1.75-4.95h-.1ZM7.15 8.55q.4.725.85 1.337q.45.613 1.05 1.263q1.1-1.2 1.825-2.462Q11.6 7.425 12.1 6H2q-.425 0-.712-.287Q1 5.425 1 5t.288-.713Q1.575 4 2 4h6V3q0-.425.288-.713Q8.575 2 9 2t.713.287Q10 2.575 10 3v1h6q.425 0 .712.287Q17 4.575 17 5t-.288.713Q16.425 6 16 6h-1.9q-.525 1.775-1.425 3.45q-.9 1.675-2.225 3.15l2.4 2.45l-.75 2.05L9 14l-4.3 4.3q-.275.275-.7.275q-.425 0-.7-.275q-.275-.275-.275-.7q0-.425.275-.7l4.35-4.35q-.675-.775-1.25-1.563q-.575-.787-1.025-1.662Q5.1 8.8 5.35 8.4t.875-.4q.25 0 .525.162q.275.163.4.388Z"></path></svg><span class="right arrow"></span></button><ul style="display:none;" class="navbar-dropdown"><!--[--><li class="navbar-dropdown-item"><a href="/doc/watch.html" class="" aria-label="简体中文"><!--[--><!--]--> 简体中文 <!--[--><!--]--></a></li><li class="navbar-dropdown-item"><a aria-current="page" href="/en/doc/watch.html" class="router-link-active router-link-exact-active router-link-active" aria-label="English"><!--[--><!--]--> English <!--[--><!--]--></a></li><!--]--></ul></div></div><div class="navbar-item"><a class="external-link" href="https://github.com/alibaba/arthas" rel="noopener noreferrer" target="_blank" aria-label="GitHub"><!--[--><!--]--><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewbox="0 0 24 24" style="height:1.25rem;width:1.25rem;vertical-align:bottom;"><path fill="currentColor" d="M12 2A10 10 0 0 0 2 12c0 4.42 2.87 8.17 6.84 9.5c.5.08.66-.23.66-.5v-1.69c-2.77.6-3.36-1.34-3.36-1.34c-.46-1.16-1.11-1.47-1.11-1.47c-.91-.62.07-.6.07-.6c1 .07 1.53 1.03 1.53 1.03c.87 1.52 2.34 1.07 2.91.83c.09-.65.35-1.09.63-1.34c-2.22-.25-4.55-1.11-4.55-4.92c0-1.11.38-2 1.03-2.71c-.1-.25-.45-1.29.1-2.64c0 0 .84-.27 2.75 1.02c.79-.22 1.65-.33 2.5-.33c.85 0 1.71.11 2.5.33c1.91-1.29 2.75-1.02 2.75-1.02c.55 1.35.2 2.39.1 2.64c.65.71 1.03 1.6 1.03 2.71c0 3.82-2.34 4.66-4.57 4.91c.36.31.69.92.69 1.85V21c0 .27.16.59.67.5C19.14 20.16 22 16.42 22 12A10 10 0 0 0 12 2Z"></path></svg><!----><!--[--><!--]--></a></div><!--]--></nav><!--[--><!--]--><ul class="sidebar-items"><!--[--><li><p tabindex="0" class="sidebar-item sidebar-heading active">DOCS <!----></p><ul style="" class="sidebar-item-children"><!--[--><li><a href="/en/doc/" class="router-link-active sidebar-item" aria-label="Introduction"><!--[--><!--]--> Introduction <!--[--><!--]--></a><!----></li><li><a href="/en/doc/quick-start.html" class="sidebar-item" aria-label="Quick Start"><!--[--><!--]--> Quick Start <!--[--><!--]--></a><!----></li><li><a href="/en/doc/install-detail.html" class="sidebar-item" aria-label="Install Arthas"><!--[--><!--]--> Install Arthas <!--[--><!--]--></a><!----></li><li><a href="/en/doc/download.html" class="sidebar-item" aria-label="Download"><!--[--><!--]--> Download <!--[--><!--]--></a><!----></li><li><a href="/en/doc/advanced-use.html" class="sidebar-item" aria-label="Advanced Usage"><!--[--><!--]--> Advanced Usage <!--[--><!--]--></a><!----></li><li><p tabindex="0" class="sidebar-item collapsible">Other features <span class="right arrow"></span></p><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a href="/en/doc/async.html" class="sidebar-item" aria-label="Arthas Async Jobs"><!--[--><!--]--> Arthas Async Jobs <!--[--><!--]--></a><!----></li><li><a href="/en/doc/save-log.html" class="sidebar-item" aria-label="Log command outputs"><!--[--><!--]--> Log command outputs <!--[--><!--]--></a><!----></li><li><a href="/en/doc/batch-support.html" class="sidebar-item" aria-label="Batch Processing"><!--[--><!--]--> Batch Processing <!--[--><!--]--></a><!----></li><li><p tabindex="0" class="sidebar-item">How to use ognl <!----></p><ul style="" class="sidebar-item-children"><!--[--><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues/11" rel="noopener noreferrer" target="_blank" aria-label="Basic ognl example"><!--[--><!--]--><span>Basic ognl example</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues/71" rel="noopener noreferrer" target="_blank" aria-label="Ognl special uses"><!--[--><!--]--><span>Ognl special uses</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><!--]--></ul></li><!--]--></ul></li><li><a href="/en/doc/commands.md" class="sidebar-item active collapsible" aria-label="All Commands"><!--[--><!--]--> All Commands <!--[--><!--]--></a><ul style="" class="sidebar-item-children"><!--[--><li><a href="/en/doc/dashboard.html" class="sidebar-item" aria-label="dashboard"><!--[--><!--]--> dashboard <!--[--><!--]--></a><!----></li><li><a href="/en/doc/getstatic.html" class="sidebar-item" aria-label="getstatic"><!--[--><!--]--> getstatic <!--[--><!--]--></a><!----></li><li><a href="/en/doc/heapdump.html" class="sidebar-item" aria-label="heapdump"><!--[--><!--]--> heapdump <!--[--><!--]--></a><!----></li><li><a href="/en/doc/jvm.html" class="sidebar-item" aria-label="jvm"><!--[--><!--]--> jvm <!--[--><!--]--></a><!----></li><li><a href="/en/doc/logger.html" class="sidebar-item" aria-label="logger"><!--[--><!--]--> logger <!--[--><!--]--></a><!----></li><li><a href="/en/doc/mbean.html" class="sidebar-item" aria-label="mbean"><!--[--><!--]--> mbean <!--[--><!--]--></a><!----></li><li><a href="/en/doc/memory.html" class="sidebar-item" aria-label="memory"><!--[--><!--]--> memory <!--[--><!--]--></a><!----></li><li><a href="/en/doc/ognl.html" class="sidebar-item" aria-label="ognl"><!--[--><!--]--> ognl <!--[--><!--]--></a><!----></li><li><a href="/en/doc/perfcounter.html" class="sidebar-item" aria-label="perfcounter"><!--[--><!--]--> perfcounter <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sysenv.html" class="sidebar-item" aria-label="sysenv"><!--[--><!--]--> sysenv <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sysprop.html" class="sidebar-item" aria-label="sysprop"><!--[--><!--]--> sysprop <!--[--><!--]--></a><!----></li><li><a href="/en/doc/thread.html" class="sidebar-item" aria-label="thread"><!--[--><!--]--> thread <!--[--><!--]--></a><!----></li><li><a href="/en/doc/vmoption.html" class="sidebar-item" aria-label="vmoption"><!--[--><!--]--> vmoption <!--[--><!--]--></a><!----></li><li><a href="/en/doc/vmtool.html" class="sidebar-item" aria-label="vmtool"><!--[--><!--]--> vmtool <!--[--><!--]--></a><!----></li><li><a href="/en/doc/classloader.html" class="sidebar-item" aria-label="classloader"><!--[--><!--]--> classloader <!--[--><!--]--></a><!----></li><li><a href="/en/doc/dump.html" class="sidebar-item" aria-label="dump"><!--[--><!--]--> dump <!--[--><!--]--></a><!----></li><li><a href="/en/doc/jad.html" class="sidebar-item" aria-label="jad"><!--[--><!--]--> jad <!--[--><!--]--></a><!----></li><li><a href="/en/doc/mc.html" class="sidebar-item" aria-label="mc"><!--[--><!--]--> mc <!--[--><!--]--></a><!----></li><li><a href="/en/doc/redefine.html" class="sidebar-item" aria-label="redefine"><!--[--><!--]--> redefine <!--[--><!--]--></a><!----></li><li><a href="/en/doc/retransform.html" class="sidebar-item" aria-label="retransform"><!--[--><!--]--> retransform <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sc.html" class="sidebar-item" aria-label="sc"><!--[--><!--]--> sc <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sm.html" class="sidebar-item" aria-label="sm"><!--[--><!--]--> sm <!--[--><!--]--></a><!----></li><li><a href="/en/doc/monitor.html" class="sidebar-item" aria-label="monitor"><!--[--><!--]--> monitor <!--[--><!--]--></a><!----></li><li><a href="/en/doc/stack.html" class="sidebar-item" aria-label="stack"><!--[--><!--]--> stack <!--[--><!--]--></a><!----></li><li><a href="/en/doc/trace.html" class="sidebar-item" aria-label="trace"><!--[--><!--]--> trace <!--[--><!--]--></a><!----></li><li><a href="/en/doc/tt.html" class="sidebar-item" aria-label="tt"><!--[--><!--]--> tt <!--[--><!--]--></a><!----></li><li><a aria-current="page" href="/en/doc/watch.html" class="router-link-active router-link-exact-active router-link-active sidebar-item active" aria-label="watch"><!--[--><!--]--> watch <!--[--><!--]--></a><!----></li><li><a href="/en/doc/profiler.html" class="sidebar-item" aria-label="profiler"><!--[--><!--]--> profiler <!--[--><!--]--></a><!----></li><li><a href="/en/doc/jfr.html" class="sidebar-item" aria-label="jfr"><!--[--><!--]--> jfr <!--[--><!--]--></a><!----></li><li><a href="/en/doc/auth.html" class="sidebar-item" aria-label="auth"><!--[--><!--]--> auth <!--[--><!--]--></a><!----></li><li><a href="/en/doc/options.html" class="sidebar-item" aria-label="options"><!--[--><!--]--> options <!--[--><!--]--></a><!----></li><li><a href="/en/doc/base64.html" class="sidebar-item" aria-label="base64"><!--[--><!--]--> base64 <!--[--><!--]--></a><!----></li><li><a href="/en/doc/cat.html" class="sidebar-item" aria-label="cat"><!--[--><!--]--> cat <!--[--><!--]--></a><!----></li><li><a href="/en/doc/cls.html" class="sidebar-item" aria-label="cls"><!--[--><!--]--> cls <!--[--><!--]--></a><!----></li><li><a href="/en/doc/echo.html" class="sidebar-item" aria-label="echo"><!--[--><!--]--> echo <!--[--><!--]--></a><!----></li><li><a href="/en/doc/grep.html" class="sidebar-item" aria-label="grep"><!--[--><!--]--> grep <!--[--><!--]--></a><!----></li><li><a href="/en/doc/help.html" class="sidebar-item" aria-label="help"><!--[--><!--]--> help <!--[--><!--]--></a><!----></li><li><a href="/en/doc/history.html" class="sidebar-item" aria-label="history"><!--[--><!--]--> history <!--[--><!--]--></a><!----></li><li><a href="/en/doc/keymap.html" class="sidebar-item" aria-label="keymap"><!--[--><!--]--> keymap <!--[--><!--]--></a><!----></li><li><a href="/en/doc/pwd.html" class="sidebar-item" aria-label="pwd"><!--[--><!--]--> pwd <!--[--><!--]--></a><!----></li><li><a href="/en/doc/quit.html" class="sidebar-item" aria-label="quit"><!--[--><!--]--> quit <!--[--><!--]--></a><!----></li><li><a href="/en/doc/reset.html" class="sidebar-item" aria-label="reset"><!--[--><!--]--> reset <!--[--><!--]--></a><!----></li><li><a href="/en/doc/session.html" class="sidebar-item" aria-label="session"><!--[--><!--]--> session <!--[--><!--]--></a><!----></li><li><a href="/en/doc/stop.html" class="sidebar-item" aria-label="stop"><!--[--><!--]--> stop <!--[--><!--]--></a><!----></li><li><a href="/en/doc/tee.html" class="sidebar-item" aria-label="tee"><!--[--><!--]--> tee <!--[--><!--]--></a><!----></li><li><a href="/en/doc/version.html" class="sidebar-item" aria-label="version"><!--[--><!--]--> version <!--[--><!--]--></a><!----></li><!--]--></ul></li><li><a href="/en/doc/web-console.html" class="sidebar-item" aria-label="Web Console"><!--[--><!--]--> Web Console <!--[--><!--]--></a><!----></li><li><a href="/en/doc/tunnel.html" class="sidebar-item" aria-label="Arthas Tunnel"><!--[--><!--]--> Arthas Tunnel <!--[--><!--]--></a><!----></li><li><a href="/en/doc/http-api.html" class="sidebar-item" aria-label="Http API"><!--[--><!--]--> Http API <!--[--><!--]--></a><!----></li><li><a href="/en/doc/docker.html" class="sidebar-item" aria-label="Docker"><!--[--><!--]--> Docker <!--[--><!--]--></a><!----></li><li><a href="/en/doc/spring-boot-starter.html" class="sidebar-item" aria-label="Arthas Spring Boot Starter"><!--[--><!--]--> Arthas Spring Boot Starter <!--[--><!--]--></a><!----></li><li><a href="/en/doc/idea-plugin.html" class="sidebar-item" aria-label="IDEA Plugin"><!--[--><!--]--> IDEA Plugin <!--[--><!--]--></a><!----></li><li><a href="/en/doc/faq.html" class="sidebar-item" aria-label="FAQ"><!--[--><!--]--> FAQ <!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues?q=label%3Auser-case" rel="noopener noreferrer" target="_blank" aria-label="User cases"><!--[--><!--]--><span>User cases</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas" rel="noopener noreferrer" target="_blank" aria-label="Start me at github"><!--[--><!--]--><span>Start me at github</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/blob/master/CONTRIBUTING.md" rel="noopener noreferrer" target="_blank" aria-label="Compile and debug/CONTRIBUTING"><!--[--><!--]--><span>Compile and debug/CONTRIBUTING</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/releases" rel="noopener noreferrer" target="_blank" aria-label="Release Notes"><!--[--><!--]--><span>Release Notes</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a><!----></li><li><a href="/en/doc/contact-us.md" class="sidebar-item" aria-label="Contact us"><!--[--><!--]--> Contact us <!--[--><!--]--></a><!----></li><!--]--></ul></li><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page" data-v-fdd717e0><!--[--><!--]--><div class="right-menu-padding theme-default-content" data-v-fdd717e0><!--[--><!--]--><div class="right-menu-wrapper" data-v-fdd717e0 data-v-2b64a081><div class="right-menu-margin" data-v-2b64a081><div class="right-menu-title" data-v-2b64a081>Table of Contents</div><div class="right-menu-content" data-v-2b64a081><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h1 id="watch" tabindex="-1"><a class="header-anchor" href="#watch" aria-hidden="true">#</a> watch</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=en&id=command-watch" target="_blank" rel="noopener noreferrer"><code>watch</code> online tutorial<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p><p>Monitor methods in data aspect including <code>return values</code>, <code>exceptions</code> and <code>parameters</code>.</p><p>With the help of <a href="https://commons.apache.org/proper/commons-ognl/index.html" target="_blank" rel="noopener noreferrer">OGNL<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>, you can easily check the details of variables when methods being invoked.</p><h2 id="parameters-options" tabindex="-1"><a class="header-anchor" href="#parameters-options" aria-hidden="true">#</a> Parameters & Options</h2><p>There are four different scenarios for <code>watch</code> command, which makes it rather complicated.</p><table><thead><tr><th style="text-align:right;">Name</th><th style="text-align:left;">Specification</th></tr></thead><tbody><tr><td style="text-align:right;"><em>class-pattern</em></td><td style="text-align:left;">pattern for the class name</td></tr><tr><td style="text-align:right;"><em>method-pattern</em></td><td style="text-align:left;">pattern for the method name</td></tr><tr><td style="text-align:right;"><em>expression</em></td><td style="text-align:left;">expression to watch, default value <code>{params, target, returnObj}</code></td></tr><tr><td style="text-align:right;"><em>condition-expression</em></td><td style="text-align:left;">condition expression to filter</td></tr><tr><td style="text-align:right;">[b]</td><td style="text-align:left;">before method being invoked</td></tr><tr><td style="text-align:right;">[e]</td><td style="text-align:left;">when method encountering exceptions</td></tr><tr><td style="text-align:right;">[s]</td><td style="text-align:left;">when method exits normally</td></tr><tr><td style="text-align:right;">[f]</td><td style="text-align:left;">when method exits (either succeed or fail with exceptions)</td></tr><tr><td style="text-align:right;">[E]</td><td style="text-align:left;">turn on regex matching while the default is wildcard matching</td></tr><tr><td style="text-align:right;">[x:]</td><td style="text-align:left;">the depth to print the specified property with default value: 1, the max value is 4</td></tr></tbody></table><p>F.Y.I</p><ol><li>any valid OGNL expression as <code>"{params,returnObj}"</code> supported</li><li>there are four <em>watching</em> points: <code>-b</code>, <code>-e</code>, <code>-s</code> and <code>-f</code> (the first three are off in default while <code>-f</code> on);</li><li>at the <em>watching</em> point, Arthas will use the <em>expression</em> to evaluate the variables and print them out;</li><li><code>in parameters</code> and <code>out parameters</code> are different since they can be modified within the invoked methods; <code>params</code> stands for <code>in parameters</code> in <code>-b</code>while <code>out parameters</code> in other <em>watching</em> points;</li><li>there are no <code>return values</code> and <code>exceptions</code> when using <code>-b</code>.</li><li>In the result of the watch command, the <code>location</code> information will be printed. There are three possible values for <code>location</code>: <code>AtEnter</code>, <code>AtExit</code>, and <code>AtExceptionExit</code>. Corresponding to the method entry, the method returns normally, and the method throws an exception.</li></ol><p>Advanced:</p><ul><li><a href="/en/doc/advice-class.html" class="">Critical fields in <em>expression</em></a></li><li><a href="https://github.com/alibaba/arthas/issues/71" target="_blank" rel="noopener noreferrer">Special usages<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li><li><a href="https://commons.apache.org/proper/commons-ognl/language-guide.html" target="_blank" rel="noopener noreferrer">OGNL official guide<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></li></ul><h2 id="usage" tabindex="-1"><a class="header-anchor" href="#usage" aria-hidden="true">#</a> Usage</h2><h3 id="start-demo" tabindex="-1"><a class="header-anchor" href="#start-demo" aria-hidden="true">#</a> Start Demo</h3><p>Start <code>math-game</code> in <a href="/en/doc/quick-start.html" class="">Quick Start</a>.</p><h3 id="check-the-out-parameters-this-and-return-value" tabindex="-1"><a class="header-anchor" href="#check-the-out-parameters-this-and-return-value" aria-hidden="true">#</a> Check the <code>out parameters</code>, <code>this</code> and <code>return value</code></h3><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>The expression to watch, default value <code>{params, target, returnObj}</code></p></div><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token parameter variable">-x</span> <span class="token number">2</span>
|
|
|
Press Q or Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class count: <span class="token number">1</span> , method count: <span class="token number">1</span><span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">32</span> ms, listenerId: <span class="token number">5</span>
|
|
|
<span class="token assign-left variable">method</span><span class="token operator">=</span>demo.MathGame.primeFactors <span class="token assign-left variable">location</span><span class="token operator">=</span>AtExceptionExit
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-08-31 <span class="token number">15</span>:22:57<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.220625ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span>-179173<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@31cefde0<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">44</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
null,
|
|
|
<span class="token punctuation">]</span>
|
|
|
<span class="token assign-left variable">method</span><span class="token operator">=</span>demo.MathGame.primeFactors <span class="token assign-left variable">location</span><span class="token operator">=</span>AtExit
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-08-31 <span class="token number">15</span>:22:58<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">1</span>.020982ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@31cefde0<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">44</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@ArrayList<span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">26947</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>In the above result, the method is executed twice, the first result is <code>location=AtExceptionExit</code>, indicating that the method throws an exception, so <code>returnObj</code> is null</li><li>In the second result is <code>location=AtExit</code>, indicating that the method returns normally, so you can see that the result of <code>returnObj</code> is an ArrayList</li></ul><h3 id="check-in-parameters" tabindex="-1"><a class="header-anchor" href="#check-in-parameters" aria-hidden="true">#</a> Check <code>in parameters</code></h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,returnObj}"</span> <span class="token parameter variable">-x</span> <span class="token number">2</span> <span class="token parameter variable">-b</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">50</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:23:23<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.0353ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span>-1077465243<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
null,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Compared to the previous <em>check</em>:</p><ul><li><code>return value</code> is <code>null</code> since it's <code>-b</code>.</li></ul><h3 id="check-before-and-after-at-the-same-time" tabindex="-1"><a class="header-anchor" href="#check-before-and-after-at-the-same-time" aria-hidden="true">#</a> Check <em>before</em> and <em>after</em> at the same time</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,target,returnObj}"</span> <span class="token parameter variable">-x</span> <span class="token number">2</span> <span class="token parameter variable">-b</span> <span class="token parameter variable">-s</span> <span class="token parameter variable">-n</span> <span class="token number">2</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">46</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:29:54<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.01696ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13038</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
null,
|
|
|
<span class="token punctuation">]</span>
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:29:54<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">4</span>.277392ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13038</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@ArrayList<span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">73</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">241</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">439</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>F.Y.I</p><ul><li><code>-n 2</code>: threshold of execution times is 2.</li><li>the first block of output is the <em>before watching</em> point;</li><li>*the order of the output determined by the *watching* order itself (nothing to do with the order of the options <code>-b -s</code>).</li></ul><h3 id="use-x-to-check-more-details" tabindex="-1"><a class="header-anchor" href="#use-x-to-check-more-details" aria-hidden="true">#</a> Use <code>-x</code> to check more details</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params,target}"</span> <span class="token parameter variable">-x</span> <span class="token number">3</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">58</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:34:19<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.587833ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">serialVersionUID</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">3905348978240129619</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">seed</span><span class="token operator">=</span>@AtomicLong<span class="token punctuation">[</span><span class="token number">3133719055989</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">multiplier</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">25214903917</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">addend</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">11</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">mask</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">281474976710655</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">DOUBLE_UNIT</span><span class="token operator">=</span>@Double<span class="token punctuation">[</span><span class="token number">1</span>.1102230246251565E-16<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">BadBound</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>bound must be positive<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">BadRange</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>bound must be greater than origin<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">BadSize</span><span class="token operator">=</span>@String<span class="token punctuation">[</span>size must be non-negative<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">seedUniquifier</span><span class="token operator">=</span>@AtomicLong<span class="token punctuation">[</span>-3282039941672302964<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">nextNextGaussian</span><span class="token operator">=</span>@Double<span class="token punctuation">[</span><span class="token number">0.0</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">haveNextNextGaussian</span><span class="token operator">=</span>@Boolean<span class="token punctuation">[</span>false<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">serialPersistentFields</span><span class="token operator">=</span>@ObjectStreamField<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>isEmpty<span class="token operator">=</span>false<span class="token punctuation">;</span><span class="token assign-left variable">size</span><span class="token operator">=</span><span class="token number">3</span><span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">unsafe</span><span class="token operator">=</span>@Unsafe<span class="token punctuation">[</span>sun.misc.Unsafe@2eaa1027<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">seedOffset</span><span class="token operator">=</span>@Long<span class="token punctuation">[</span><span class="token number">24</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13159</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>-x</code>: Expand level of object (1 by default)</li><li>The max value of <code>-x</code> is 4, to prevent the expansion result taking up too much memory. Users can specify the field in the <code>ognl</code> expression.</li></ul><h3 id="use-condition-expressions-to-locate-specific-call" tabindex="-1"><a class="header-anchor" href="#use-condition-expressions-to-locate-specific-call" aria-hidden="true">#</a> Use condition expressions to locate specific call</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params[0],target}"</span> <span class="token string">"params[0]<0"</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">68</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:36:04<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.530255ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span>-18178089<span class="token punctuation">]</span>,
|
|
|
@MathGame<span class="token punctuation">[</span>demo.MathGame@41cf53f9<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="check-exceptions" tabindex="-1"><a class="header-anchor" href="#check-exceptions" aria-hidden="true">#</a> Check <code>exceptions</code></h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">"{params[0],throwExp}"</span> <span class="token parameter variable">-e</span> <span class="token parameter variable">-x</span> <span class="token number">2</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">62</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:38:00<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">1</span>.414993ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span>-1120397038<span class="token punctuation">]</span>,
|
|
|
java.lang.IllegalArgumentException: number is: -1120397038, need <span class="token operator">>=</span> <span class="token number">2</span>
|
|
|
at demo.MathGame.primeFactors<span class="token punctuation">(</span>MathGame.java:46<span class="token punctuation">)</span>
|
|
|
at demo.MathGame.run<span class="token punctuation">(</span>MathGame.java:24<span class="token punctuation">)</span>
|
|
|
at demo.MathGame.main<span class="token punctuation">(</span>MathGame.java:16<span class="token punctuation">)</span>
|
|
|
,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>-e</code>: Trigger when an exception is thrown</li><li><code>throwExp</code>: the exception object</li></ul><h3 id="filter-by-time-cost" tabindex="-1"><a class="header-anchor" href="#filter-by-time-cost" aria-hidden="true">#</a> Filter by time cost</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'{params, returnObj}'</span> <span class="token string">'#cost>200'</span> <span class="token parameter variable">-x</span> <span class="token number">2</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">66</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:40:28<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">2112</span>.168897ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@ArrayList<span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">428379493</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>#cost>200</code> (<code>ms</code>) filter out all invokings that take less than <code>200ms</code>.</li></ul><h3 id="check-the-field-of-the-target-object" tabindex="-1"><a class="header-anchor" href="#check-the-field-of-the-target-object" aria-hidden="true">#</a> Check the field of the target object</h3><ul><li><code>target</code> is the <code>this</code> object in java.</li></ul><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'target'</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">52</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">19</span>:41:52<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.477882ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@MathGame<span class="token punctuation">[</span>
|
|
|
<span class="token assign-left variable">random</span><span class="token operator">=</span>@Random<span class="token punctuation">[</span>java.util.Random@522b408a<span class="token punctuation">]</span>,
|
|
|
<span class="token assign-left variable">illegalArgumentCount</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">13355</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li><code>target.field_name</code>: the field of the current object.</li></ul><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> demo.MathGame primeFactors <span class="token string">'target.illegalArgumentCount'</span>
|
|
|
Press Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class-cnt:1 , method-cnt:1<span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">67</span> ms.
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">20</span>:04:34<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">131</span>.303498ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">8</span><span class="token punctuation">]</span>
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2018</span>-12-03 <span class="token number">20</span>:04:35<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.961441ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@Integer<span class="token punctuation">[</span><span class="token number">8</span><span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="get-a-static-field-and-calling-a-static-method" tabindex="-1"><a class="header-anchor" href="#get-a-static-field-and-calling-a-static-method" aria-hidden="true">#</a> Get a static field and calling a static method</h3><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">watch</span> demo.MathGame * <span class="token string">'{params,@demo.MathGame@random.nextInt(100)}'</span> <span class="token parameter variable">-v</span> <span class="token parameter variable">-n</span> <span class="token number">1</span> <span class="token parameter variable">-x</span> <span class="token number">2</span>
|
|
|
<span class="token punctuation">[</span>arthas@6527<span class="token punctuation">]</span>$ <span class="token function">watch</span> demo.MathGame * <span class="token string">'{params,@demo.MathGame@random.nextInt(100)}'</span> <span class="token parameter variable">-n</span> <span class="token number">1</span> <span class="token parameter variable">-x</span> <span class="token number">2</span>
|
|
|
Press Q or Ctrl+C to abort.
|
|
|
Affect<span class="token punctuation">(</span>class count: <span class="token number">1</span> , method count: <span class="token number">5</span><span class="token punctuation">)</span> cost <span class="token keyword">in</span> <span class="token number">34</span> ms, listenerId: <span class="token number">3</span>
|
|
|
<span class="token assign-left variable">ts</span><span class="token operator">=</span><span class="token number">2021</span>-01-05 <span class="token number">21</span>:35:20<span class="token punctuation">;</span> <span class="token punctuation">[</span>cost<span class="token operator">=</span><span class="token number">0</span>.173966ms<span class="token punctuation">]</span> <span class="token assign-left variable">result</span><span class="token operator">=</span>@ArrayList<span class="token punctuation">[</span>
|
|
|
@Object<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">[</span>
|
|
|
@Integer<span class="token punctuation">[</span>-138282<span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>,
|
|
|
@Integer<span class="token punctuation">[</span><span class="token number">89</span><span class="token punctuation">]</span>,
|
|
|
<span class="token punctuation">]</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>Note that here you use <code>Thread.currentThread().getContextClassLoader()</code> to load, and it is better to use the exact <code>classloader</code> <a href="/en/doc/ognl.html" class="">ognl</a>.</li></ul><h3 id="exclude-the-specified-class" tabindex="-1"><a class="header-anchor" href="#exclude-the-specified-class" aria-hidden="true">#</a> Exclude the specified class</h3><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>The watch/trace/monitor/stack/tt commands all support the <code>--exclude-class-pattern</code> parameter</p></div><p>Use the <code>--exclude-class-pattern</code> parameter to exclude the specified class, for example:</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">watch</span> javax.servlet.Filter * --exclude-class-pattern com.demo.TestFilter
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="does-not-match-subclass" tabindex="-1"><a class="header-anchor" href="#does-not-match-subclass" aria-hidden="true">#</a> Does not match subclass</h3><p>By default, the watch/trace/monitor/stack/tt commands will match subclass. If you don't want to match, you can turn it off.</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>options disable-sub-class <span class="token boolean">true</span>
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="use-the-v-parameter-to-print-more-information" tabindex="-1"><a class="header-anchor" href="#use-the-v-parameter-to-print-more-information" aria-hidden="true">#</a> Use the -v parameter to print more information</h3><blockquote><p>The watch/trace/monitor/stack/tt commands all support the <code>-v</code> parameter.</p></blockquote><p>When the command is executed, there is no output result. There are two possibilities:</p><ol><li>The matched function is not executed</li><li>The result of the conditional expression is false</li></ol><p>But the user cannot tell which situation is.</p><p>Using the <code>-v</code> option, the specific value and execution result of <code>Condition express</code> will be printed for easy confirmation.</p><p>such as:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ watch -v -x 2 demo.MathGame print 'params' 'params[0] > 100000'
|
|
|
Press Q or Ctrl+C to abort.
|
|
|
Affect(class count: 1 , method count: 1) cost in 29 ms, listenerId: 11
|
|
|
Condition express: params[0] > 100000 , result: false
|
|
|
Condition express: params[0] > 100000 , result: false
|
|
|
Condition express: params[0] > 100000 , result: true
|
|
|
ts=2020-12-02 22:38:56; [cost=0.060843ms] result=@Object[][
|
|
|
@Integer[1],
|
|
|
@ArrayList[
|
|
|
@Integer[200033],
|
|
|
],
|
|
|
]
|
|
|
Condition express: params[0] > 100000 , result: true
|
|
|
ts=2020-12-02 22:38:57; [cost=0.052877ms] result=@Object[][
|
|
|
@Integer[1],
|
|
|
@ArrayList[
|
|
|
@Integer[29],
|
|
|
@Integer[4243],
|
|
|
],
|
|
|
]
|
|
|
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-fdd717e0><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/en/doc/watch.md" rel="noopener noreferrer" target="_blank" aria-label="Edit this page on GitHub"><!--[--><!--]--><span>Edit this page on GitHub</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!--[--><!--]--></a></div><div class="meta-item last-updated"><span class="meta-item-label">Last Updated: </span><!----></div><div class="meta-item contributors"><span class="meta-item-label">Contributors: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: LHearen@126.com">Hearen</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: i@fatpandac.com">Fatpandac</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: hollowman186@vip.qq.com">Hollow Man</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: lhearen@gmail.com">LHearen</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: 983433479@qq.com">汪吉</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav right-menu-padding" data-v-fdd717e0><p class="inner"><span class="prev"><a href="/en/doc/tt.html" class="" aria-label="tt"><!--[--><!--]--> tt <!--[--><!--]--></a></span><span class="next"><a href="/en/doc/profiler.html" class="" aria-label="profiler"><!--[--><!--]--> profiler <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
|
|
|
<script type="module" src="/assets/app.a799ec6e.js" defer></script>
|
|
|
</body>
|
|
|
</html>
|