<!DOCTYPE html>
< html lang = "zh-CN" >
< head >
< meta charset = "utf-8" >
< meta name = "viewport" content = "width=device-width,initial-scale=1" >
< meta name = "generator" content = "VuePress 2.0.0-beta.49" >
< 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 > Arthas 后台异步任务 | arthas< / title > < meta name = "description" content = "arthas 使用文档" >
< link rel = "modulepreload" href = "/assets/app.e9adadd6.js" > < link rel = "modulepreload" href = "/assets/async.html.24e196a7.js" > < link rel = "modulepreload" href = "/assets/async.html.7fc6690f.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.5be10814.js" > < link rel = "prefetch" href = "/assets/advanced-use.html.80c572ab.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.126a2442.js" > < link rel = "prefetch" href = "/assets/arthas3.html.f866a915.js" > < link rel = "prefetch" href = "/assets/auth.html.7faa0702.js" > < link rel = "prefetch" href = "/assets/base64.html.91916ad8.js" > < link rel = "prefetch" href = "/assets/batch-support.html.6d8369c7.js" > < link rel = "prefetch" href = "/assets/cat.html.49018237.js" > < link rel = "prefetch" href = "/assets/classloader.html.e5597a48.js" > < link rel = "prefetch" href = "/assets/cls.html.3d057407.js" > < link rel = "prefetch" href = "/assets/commands.html.58e9e974.js" > < link rel = "prefetch" href = "/assets/contact-us.html.e0d74259.js" > < link rel = "prefetch" href = "/assets/dashboard.html.688b447f.js" > < link rel = "prefetch" href = "/assets/docker.html.17503d14.js" > < link rel = "prefetch" href = "/assets/download.html.19809e39.js" > < link rel = "prefetch" href = "/assets/dump.html.35a47ccf.js" > < link rel = "prefetch" href = "/assets/echo.html.81510109.js" > < link rel = "prefetch" href = "/assets/faq.html.e22d74d2.js" > < link rel = "prefetch" href = "/assets/getstatic.html.9ffb9ff2.js" > < link rel = "prefetch" href = "/assets/grep.html.7747b85b.js" > < link rel = "prefetch" href = "/assets/groovy.html.3c2a5669.js" > < link rel = "prefetch" href = "/assets/heapdump.html.98d7b14d.js" > < link rel = "prefetch" href = "/assets/help.html.67db59f7.js" > < link rel = "prefetch" href = "/assets/history.html.f6e93473.js" > < link rel = "prefetch" href = "/assets/http-api.html.8abd260a.js" > < link rel = "prefetch" href = "/assets/idea-plugin.html.68b7d4f4.js" > < link rel = "prefetch" href = "/assets/install-detail.html.666bc4d2.js" > < link rel = "prefetch" href = "/assets/jad.html.a62cf748.js" > < link rel = "prefetch" href = "/assets/jfr.html.fb32b04e.js" > < link rel = "prefetch" href = "/assets/jvm.html.970a2dcd.js" > < link rel = "prefetch" href = "/assets/keymap.html.79b77d01.js" > < link rel = "prefetch" href = "/assets/logger.html.1c7e6fb8.js" > < link rel = "prefetch" href = "/assets/manual-install.html.5992ea2f.js" > < link rel = "prefetch" href = "/assets/mbean.html.07f7548d.js" > < link rel = "prefetch" href = "/assets/mc.html.4a8fe9c1.js" > < link rel = "prefetch" href = "/assets/memory.html.f3395aa5.js" > < link rel = "prefetch" href = "/assets/monitor.html.f16f1733.js" > < link rel = "prefetch" href = "/assets/ognl.html.e96e8461.js" > < link rel = "prefetch" href = "/assets/options.html.f364e3b1.js" > < link rel = "prefetch" href = "/assets/perfcounter.html.5ac9dd17.js" > < link rel = "prefetch" href = "/assets/profiler.html.8b48b000.js" > < link rel = "prefetch" href = "/assets/pwd.html.0881d938.js" > < link rel = "prefetch" href = "/assets/quick-start.html.d22745bc.js" > < link rel = "prefetch" href = "/assets/quit.html.7ac530c1.js" > < link rel = "prefetch" href = "/assets/redefine.html.7a72fe7b.js" > < link rel = "prefetch" href = "/assets/release-notes.html.dd1cd195.js" > < link rel = "prefetch" href = "/assets/reset.html.452a35fa.js" > < link rel = "prefetch" href = "/assets/retransform.html.fbef0997.js" > < link rel = "prefetch" href = "/assets/save-log.html.c6a45ce2.js" > < link rel = "prefetch" href = "/assets/sc.html.6441d65e.js" > < link rel = "prefetch" href = "/assets/session.html.ebfd8261.js" > < link rel = "prefetch" href = "/assets/sm.html.9e10db61.js" > < link rel = "prefetch" href = "/assets/spring-boot-starter.html.c4118b0a.js" > < link rel = "prefetch" href = "/assets/stack.html.9add4cf4.js" > < link rel = "prefetch" href = "/assets/start-arthas.html.bb492515.js" > < link rel = "prefetch" href = "/assets/stop.html.b66bc06b.js" > < link rel = "prefetch" href = "/assets/sysenv.html.26a8e556.js" > < link rel = "prefetch" href = "/assets/sysprop.html.b7e9f6f3.js" > < link rel = "prefetch" href = "/assets/tee.html.ad9aa342.js" > < link rel = "prefetch" href = "/assets/thread.html.e5d9019c.js
< link rel = "stylesheet" href = "/assets/style.3627c3cf.css" >
< / head >
< body >
< div id = "app" > <!-- [ --> < div class = "theme-container" > <!-- [ --> < header class = "navbar" > < div class = "toggle-sidebar-button" title = "切换侧边栏" aria-expanded = "false" role = "button" tabindex = "0" > < div class = "icon" aria-hidden = "true" > < span > < / span > < span > < / span > < span > < / span > < / div > < / div > < span > < a href = "/" class = "" data-v-2aa8cc94 > <!-- --> < span class = "site-name can-hide" data-v-2aa8cc94 > arthas< / span > < span class = "navbar-version" data-v-2aa8cc94 > v3.6.5< / span > < / a > < / span > < div class = "navbar-items-wrapper" style = "" > <!-- [ --> <!-- ] --> < nav class = "navbar-items can-hide" > <!-- [ --> < div class = "navbar-item" > < a href = "/" class = "" aria-label = "首页" > <!-- [ --> <!-- ] --> 首页 <!-- [ --> <!-- ] --> < / a > < / div > < div class = "navbar-item" > < a class = "external-link" href = "/doc/arthas-tutorials.html?language=cn&id=arthas-basics" rel = "noopener noreferrer" target = "_blank" aria-label = "在线教程" > <!-- [ --> <!-- ] --> < span > 在线教程< / 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" > 在新窗口打开< / span > < / span > <!-- [ --> <!-- ] --> < / a > < / div > < div class = "navbar-item" > < a href = "/doc/" class = "router-link-active" aria-label = "文档" > <!-- [ --> <!-- ] --> 文档 <!-- [ --> <!-- ] --> < / a > < / div > < div class = "navbar-item" > < a href = "/doc/commands.md" class = "" aria-label = "命令列表" > <!-- [ --> <!-- ] --> 命令列表 <!-- [ --> <!-- ] --> < / a > < / div > < div class = "navbar-item" > < a href = "/doc/download.md" class = "" aria-label = "下载" > <!-- [ --> <!-- ] --> 下载 <!-- [ --> <!-- ] --> < / a > < / div > < div class = "navbar-item" > < div class = "navbar-dropdown-wrapper" > < button class = "navbar-dropdown-title" type = "button" aria-label = "解决方案" > < span class = "title" > 解决方案< / span > < span class = "arrow down" > < / span > < / button > < button class = "navbar-dropdown-title-mobile" type = "button" aria-label = "解决方案" > < span class = "title" > 解决方案< / 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 = "微服务解决方案" > <!-- [ --> <!-- ] --> < span > 微服务解决方案< / 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" > 在新窗口打开< / 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 = "分布式事务解决方案" > <!-- [ --> <!-- ] --> < span > 分布式事务解决方案< / 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" > 在新窗口打开< / span > < / span > <!-- [ --> <!-- ] --> < / a > < / li > < li class = "navbar-dropdown-item" > < a class = "external-link" href = "https://www.aliyun.com/product/ahas?spm=artha
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < p > 这时命令在后台执行，可以在 console 中继续执行其他命令。< / p > < h2 id = "_2-通过-jobs-查看任务" tabindex = "-1" > < a class = "header-anchor" href = "#_2-通过-jobs-查看任务" aria-hidden = "true" > #< / a > 2. 通过 jobs 查看任务< / h2 > < p > 如果希望查看当前有哪些 arthas 任务在执行，可以执行 jobs 命令，执行结果如下< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ < span class = "token function" > jobs< / span >
< span class = "token punctuation" > [< / span > < span class = "token number" > 10< / span > < span class = "token punctuation" > ]< / span > *
Stopped < span class = "token function" > watch< / span > com.taobao.container.Test < span class = "token builtin class-name" > test< / span > < span class = "token string" > " params[0].{? #this.name == null }" < / span > -x < span class = "token number" > 2< / span >
execution count < span class = "token builtin class-name" > :< / span > < span class = "token number" > 19< / span >
start < span class = "token function" > time< / span > < span class = "token builtin class-name" > :< / span > Fri Sep < span class = "token number" > 22< / span > 09:59:55 CST < span class = "token number" > 2017< / span >
< span class = "token function" > timeout< / span > < span class = "token function" > date< / span > < span class = "token builtin class-name" > :< / span > Sat Sep < span class = "token number" > 23< / span > 09:59:55 CST < span class = "token number" > 2017< / span >
session < span class = "token builtin class-name" > :< / span > 3648e874-5e69-473f-9eed-7f89660b079b < span class = "token punctuation" > (< / span > current< 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 > < p > 可以看到目前有一个后台任务在执行。< / p > < ul > < li > job id 是 10, < code > *< / code > 表示此 job 是当前 session 创建< / li > < li > 状态是 Stopped< / li > < li > execution count 是执行次数，从启动开始已经执行了 19 次< / li > < li > timeout date 是超时的时间，到这个时间，任务将会自动超时退出< / li > < / ul > < h2 id = "_3-任务暂停和取消" tabindex = "-1" > < a class = "header-anchor" href = "#_3-任务暂停和取消" aria-hidden = "true" > #< / a > 3. 任务暂停和取消< / h2 > < p > 当任务正在前台执行，比如直接调用命令< code > trace Test t< / code > 或者调用后台执行命令< code > trace Test t & < / code > 后又通过< code > fg< / code > 命令将任务转到前台。这时 console 中无法继续执行命令，但是可以接收并处理以下事件：< / p > < ul > < li > ‘ ’ ： < code > jbos< / code > 查看任务状态将会变为 Stopped， < code > bg < job-id> < / code > 或者< code > fg < job-id> < / code > 可让任务重新开始执行< / li > < li > ‘ ’ ： < / li > < li > ‘ ’ ： < / li > < / ul > < h2 id = "_4-fg、bg-命令-将命令转到前台、后台继续执行" tabindex = "-1" > < a class = "header-anchor" href = "#_4-fg、bg-命令-将命令转到前台、后台继续执行" aria-hidden = "true" > #< / a > 4. fg、bg 命令，将命令转到前台、后台继续执行< / h2 > < ul > < li > 任务在后台执行或者暂停状态（< code > ctrl + z< / code > 暂停任务）时，执行< code > fg < job-id> < / code > 将可以把对应的任务转到前台继续执行。在前台执行时，无法在 console 中执行其他命令< / li > < li > 当任务处于暂停状态时（< code > ctrl + z< / code > 暂停任务），执行< code > bg < job-id> < / code > 将可以把对应的任务在后台继续执行< / li > < li > 非当前 session 创建的 job， < / li > < / ul > < h2 id = "_5-任务输出重定向" tabindex = "-1" > < a class = "header-anchor" href = "#_5-任务输出重定向" aria-hidden = "true" > #< / a > 5. 任务输出重定向< / h2 > < p > 可通过< code > > < / code > 或者< code > > > < / code > 将任务输出结果输出到指定的文件中，可以和< code > & < / code > 一起使用，实现 arthas 命令的后台异步任务。比如：< / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace Test t < span class = "token operator" > > > < / span > test.out < span class = "token operator" > & < / span >
< / code > < / pre > < div class = "line-numbers" aria-hidden = "true" > < div class = "line-number" > < / div > < / div > < / div > < p > 这时 trace 命令会在后台执行，并且把结果输出到~/logs/arthas-cache/test.out。可继续执行其他命令。并可查看文件中的命令执行结果。< / p > < p > 当连接到远程的 arthas server 时， ， < / p > < div class = "language-bash ext-sh line-numbers-mode" > < pre class = "language-bash" > < code > $ trace Test t < span class = "token operator" > > > < / span > < span class = "token operator" > & < / span >
job < span class = "token function" > id< / span > < span class = "token builtin class-name" > :< / span > < span class = "token number" > 2< / span >
cache location < span class = "token builtin class-name" > :< / span > /Users/gehui/logs/arthas-cache/28198/2
< / 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 > < / div > < p > 可以看到并没有指定重定向文件位置， ， < code > /Users/gehui/logs/arthas-cache/28198/2< / code > 中， < / p > < h2 id = "_6-停止命令" tabindex = "-1" > < a class = "header-anchor" href = "#_6-停止命令" aria-hidden = "true" > #< / a > 6. 停止命令< / h2 > < p > 异步执行的命令，如果希望停止，可执行< code > kill < job-id> < / code > < / p > < h2 id = "_7-其他" tabindex = "-1" > < a class = "header-anchor" href = "#_7-其他" aria-hidden = "true" > #< / a > 7. 其他< / h2 > < ul > < li > 最多同时支持 8 个命令使用重定向将结果写日志< / li > < li > 请勿同时开启过多的后台异步命令，以免对目标 JVM 性能造成影响< / li > < li > 如果不想停止 arthas， ， < code > quit< / code > 退出 arthas 控制台（< code > stop< / code > 会停止 arthas 服务）< / li > < / ul > < / div > <!-- [ --> <!-- ] --> < / div > < footer class = "page-meta right-menu-padding" data-v-8e2a76de > < div class = "meta-item edit-link" > < a class = "external-link meta-item-label" href = "https://github.com/alibaba/arthas/edit/master/site/docs/doc/async.md" rel = "noopener noreferrer" target = "_blank" aria-label = "在 GitHub 上编辑此页" > <!-- [ --> <!-- ] --> < span > 在 GitHub 上编辑此页< / 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" > 在新窗口打开< / 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" > 贡献者: < / span > < span class = "meta-item-info" > <!-- [ --> <!-- [ --> < span class = "contributor" title = "email: hengyunabc@gmail.com" > hengyunabc< / span > <!-- [ --> , <!-- ] --> <!-- ] --> <!-- [ --> < span class = "contributor" title = "email: hollowman186@vip.qq.com" > Hollow Man< / span > <!-- [ --> , <!-- ] --> <!-- ] --> <!-- [ --> < span class = "contributor" title = "email: 983433479@qq.com" > 汪吉< / span > <!-- --> <!-- ] --> <!-- ] --> < / span > < / div > < / footer > < nav class = "page-nav right-menu-padding" data-v-8e2a76de > < p class = "inner" > <!-- --> < span class = "next" > < a href = "/doc/save-log.html" class = "" aria-label = "执行结果存日志" > <!-- [ --> <!-- ] --> 执行结果存日志 <!-- [ --> <!-- ] --> < / a > < / span > < / p > < / nav > <!-- [ --> <!-- ] --> < / main > <!-- ] --> < / div > <!-- --> <!-- ] --> < / div >
< script type = "module" src = "/assets/app.e9adadd6.js" defer > < / script >
< / body >
< / html >
