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3.3.7
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<li class="toctree-l3"><a class="reference external" href="https://github.com/alibaba/arthas/issues/11">ognl表达式的用法说明</a></li>
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<div class="section" id="id1">
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<h1>进阶使用<a class="headerlink" href="#id1" title="永久链接至标题">¶</a></h1>
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<div class="section" id="id2">
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<h2>基础命令<a class="headerlink" href="#id2" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p>help——查看命令帮助信息</p></li>
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<li><p><a class="reference internal" href="cat.html"><span class="doc">cat</span></a>——打印文件内容，和linux里的cat命令类似</p></li>
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<li><p><a class="reference internal" href="echo.html"><span class="doc">echo</span></a>–打印参数，和linux里的echo命令类似</p></li>
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<li><p><a class="reference internal" href="grep.html"><span class="doc">grep</span></a>——匹配查找，和linux里的grep命令类似</p></li>
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<li><p><a class="reference internal" href="tee.html"><span class="doc">tee</span></a>——复制标准输入到标准输出和指定的文件，和linux里的tee命令类似</p></li>
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<li><p><a class="reference internal" href="pwd.html"><span class="doc">pwd</span></a>——返回当前的工作目录，和linux命令类似</p></li>
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<li><p>cls——清空当前屏幕区域</p></li>
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<li><p>session——查看当前会话的信息</p></li>
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<li><p><a class="reference internal" href="reset.html"><span class="doc">reset</span></a>——重置增强类，将被 Arthas 增强过的类全部还原，Arthas 服务端关闭时会重置所有增强过的类</p></li>
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<li><p>version——输出当前目标 Java 进程所加载的 Arthas 版本号</p></li>
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<li><p>history——打印命令历史</p></li>
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<li><p>quit——退出当前 Arthas 客户端，其他 Arthas 客户端不受影响</p></li>
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<li><p>stop——关闭 Arthas 服务端，所有 Arthas 客户端全部退出</p></li>
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<li><p><a class="reference internal" href="keymap.html"><span class="doc">keymap</span></a>——Arthas快捷键列表及自定义快捷键</p></li>
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</ul>
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</div>
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<div class="section" id="jvm">
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<h2>jvm相关<a class="headerlink" href="#jvm" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p><a class="reference internal" href="dashboard.html"><span class="doc">dashboard</span></a>——当前系统的实时数据面板</p></li>
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<li><p><a class="reference internal" href="thread.html"><span class="doc">thread</span></a>——查看当前 JVM 的线程堆栈信息</p></li>
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<li><p><a class="reference internal" href="jvm.html"><span class="doc">jvm</span></a>——查看当前 JVM 的信息</p></li>
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<li><p><a class="reference internal" href="sysprop.html"><span class="doc">sysprop</span></a>——查看和修改JVM的系统属性</p></li>
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<li><p><a class="reference internal" href="sysenv.html"><span class="doc">sysenv</span></a>——查看JVM的环境变量</p></li>
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<li><p><a class="reference internal" href="vmoption.html"><span class="doc">vmoption</span></a>——查看和修改JVM里诊断相关的option</p></li>
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<li><p><a class="reference internal" href="perfcounter.html"><span class="doc">perfcounter</span></a>——查看当前 JVM 的Perf Counter信息</p></li>
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<li><p><a class="reference internal" href="logger.html"><span class="doc">logger</span></a>——查看和修改logger</p></li>
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<li><p><a class="reference internal" href="getstatic.html"><span class="doc">getstatic</span></a>——查看类的静态属性</p></li>
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<li><p><a class="reference internal" href="ognl.html"><span class="doc">ognl</span></a>——执行ognl表达式</p></li>
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<li><p><a class="reference internal" href="mbean.html"><span class="doc">mbean</span></a>——查看 Mbean 的信息</p></li>
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<li><p><a class="reference internal" href="heapdump.html"><span class="doc">heapdump</span></a>——dump java heap, 类似jmap命令的heap dump功能</p></li>
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</ul>
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</div>
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<div class="section" id="class-classloader">
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<h2>class/classloader相关<a class="headerlink" href="#class-classloader" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p><a class="reference internal" href="sc.html"><span class="doc">sc</span></a>——查看JVM已加载的类信息</p></li>
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<li><p><a class="reference internal" href="sm.html"><span class="doc">sm</span></a>——查看已加载类的方法信息</p></li>
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<li><p><a class="reference internal" href="jad.html"><span class="doc">jad</span></a>——反编译指定已加载类的源码</p></li>
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<li><p><a class="reference internal" href="mc.html"><span class="doc">mc</span></a>——内存编译器，内存编译<code class="docutils literal notranslate"><span class="pre">.java</span></code>文件为<code class="docutils literal notranslate"><span class="pre">.class</span></code>文件</p></li>
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<li><p><a class="reference internal" href="redefine.html"><span class="doc">redefine</span></a>——加载外部的<code class="docutils literal notranslate"><span class="pre">.class</span></code>文件，redefine到JVM里</p></li>
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<li><p><a class="reference internal" href="dump.html"><span class="doc">dump</span></a>——dump 已加载类的 byte code 到特定目录</p></li>
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<li><p><a class="reference internal" href="classloader.html"><span class="doc">classloader</span></a>——查看classloader的继承树，urls，类加载信息，使用classloader去getResource</p></li>
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</ul>
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</div>
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<div class="section" id="monitor-watch-trace">
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<h2>monitor/watch/trace相关<a class="headerlink" href="#monitor-watch-trace" title="永久链接至标题">¶</a></h2>
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<blockquote>
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<div><p>请注意，这些命令，都通过字节码增强技术来实现的，会在指定类的方法中插入一些切面来实现数据统计和观测，因此在线上、预发使用时，请尽量明确需要观测的类、方法以及条件，诊断结束要执行 <code class="docutils literal notranslate"><span class="pre">stop</span></code> 或将增强过的类执行 <code class="docutils literal notranslate"><span class="pre">reset</span></code> 命令。</p>
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</div></blockquote>
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<ul class="simple">
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<li><p><a class="reference internal" href="monitor.html"><span class="doc">monitor</span></a>——方法执行监控</p></li>
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<li><p><a class="reference internal" href="watch.html"><span class="doc">watch</span></a>——方法执行数据观测</p></li>
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<li><p><a class="reference internal" href="trace.html"><span class="doc">trace</span></a>——方法内部调用路径，并输出方法路径上的每个节点上耗时</p></li>
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<li><p><a class="reference internal" href="stack.html"><span class="doc">stack</span></a>——输出当前方法被调用的调用路径</p></li>
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<li><p><a class="reference internal" href="tt.html"><span class="doc">tt</span></a>——方法执行数据的时空隧道，记录下指定方法每次调用的入参和返回信息，并能对这些不同的时间下调用进行观测</p></li>
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</ul>
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</div>
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<div class="section" id="profiler">
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<h2>profiler/火焰图<a class="headerlink" href="#profiler" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p><a class="reference internal" href="profiler.html"><span class="doc">profiler</span></a>–使用<a class="reference external" href="https://github.com/jvm-profiling-tools/async-profiler">async-profiler</a>对应用采样，生成火焰图</p></li>
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</ul>
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</div>
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<div class="section" id="options">
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<h2>options<a class="headerlink" href="#options" title="永久链接至标题">¶</a></h2>
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<ul class="simple">
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<li><p><a class="reference internal" href="options.html"><span class="doc">options</span></a>——查看或设置Arthas全局开关</p></li>
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</ul>
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</div>
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<div class="section" id="id3">
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<h2>管道<a class="headerlink" href="#id3" title="永久链接至标题">¶</a></h2>
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<p>Arthas支持使用管道对上述命令的结果进行进一步的处理，如<code class="docutils literal notranslate"><span class="pre">sm</span> <span class="pre">java.lang.String</span> <span class="pre">*</span> <span class="pre">|</span> <span class="pre">grep</span> <span class="pre">'index'</span></code></p>
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<ul class="simple">
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|
<li><p>grep——搜索满足条件的结果</p></li>
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<li><p>plaintext——将命令的结果去除ANSI颜色</p></li>
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<li><p>wc——按行统计输出结果</p></li>
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</ul>
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</div>
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<div class="section" id="id4">
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<h2>后台异步任务<a class="headerlink" href="#id4" title="永久链接至标题">¶</a></h2>
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<p>当线上出现偶发的问题，比如需要watch某个条件，而这个条件一天可能才会出现一次时，异步后台任务就派上用场了，详情请参考<a class="reference internal" href="async.html"><span class="doc">这里</span></a></p>
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<ul class="simple">
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|
<li><p>使用 > 将结果重写向到日志文件，使用 & 指定命令是后台运行，session断开不影响任务执行（生命周期默认为1天）</p></li>
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<li><p>jobs——列出所有job</p></li>
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<li><p>kill——强制终止任务</p></li>
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<li><p>fg——将暂停的任务拉到前台执行</p></li>
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|
<li><p>bg——将暂停的任务放到后台执行</p></li>
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</ul>
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</div>
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<div class="section" id="web-console">
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|
<h2>Web Console<a class="headerlink" href="#web-console" title="永久链接至标题">¶</a></h2>
|
|
|
<p>通过websocket连接Arthas。</p>
|
|
|
<div class="toctree-wrapper compound">
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<ul>
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|
<li class="toctree-l1"><a class="reference internal" href="web-console.html">Web Console</a></li>
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</ul>
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|
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</div>
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</div>
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|
|
<div class="section" id="java-agent">
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|
<h2>以java agent方式启动<a class="headerlink" href="#java-agent" title="永久链接至标题">¶</a></h2>
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|
|
<div class="toctree-wrapper compound">
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|
<ul>
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|
<li class="toctree-l1"><a class="reference internal" href="agent.html">以java agent方式启动</a></li>
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</ul>
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|
</div>
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</div>
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|
|
<div class="section" id="as-sh-arthas-boot">
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|
|
<h2>as.sh 和 arthas-boot 技巧<a class="headerlink" href="#as-sh-arthas-boot" title="永久链接至标题">¶</a></h2>
|
|
|
<ul class="simple">
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|
|
<li><p>通过<code class="docutils literal notranslate"><span class="pre">select</span></code>功能选择attach的进程。</p></li>
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|
|
</ul>
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|
|
<p>正常情况下，每次执行<code class="docutils literal notranslate"><span class="pre">as.sh</span></code>/<code class="docutils literal notranslate"><span class="pre">arthas-boot.jar</span></code>需要选择，或者指定PID。这样会比较麻烦，因为每次启动应用，它的PID会变化。</p>
|
|
|
<p>比如，已经启动了<code class="docutils literal notranslate"><span class="pre">arthas-demo.jar</span></code>，使用<code class="docutils literal notranslate"><span class="pre">jps</span></code>命令查看：</p>
|
|
|
<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ jps
|
|
|
58883 arthas-demo.jar
|
|
|
58884 Jps</pre></div>
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|
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</div>
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|
|
<p>通过<code class="docutils literal notranslate"><span class="pre">select</span></code>参数可以指定进程名字，非常方便。</p>
|
|
|
<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ ./as.sh --select arthas-demo
|
|
|
Arthas script version: 3.3.6
|
|
|
[INFO] JAVA_HOME: /tmp/java/8.0.222-zulu
|
|
|
Arthas home: /Users/admin/.arthas/lib/3.3.6/arthas
|
|
|
Calculating attach execution time...
|
|
|
Attaching to 59161 using version /Users/admin/.arthas/lib/3.3.6/arthas...
|
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|
|
real 0m0.572s
|
|
|
user 0m0.281s
|
|
|
sys 0m0.039s
|
|
|
Attach success.
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|
|
telnet connecting to arthas server... current timestamp is 1594280799
|
|
|
Trying 127.0.0.1...
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|
|
Connected to localhost.
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|
|
Escape character is '^]'.
|
|
|
,---. ,------. ,--------.,--. ,--. ,---. ,---.
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|
|
/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
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|
| .-. || '--'.' | | | .--. || .-. |`. `-.
|
|
|
| | | || |\ \ | | | | | || | | |.-' |
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|
`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
|
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|
|
wiki https://alibaba.github.io/arthas
|
|
|
tutorials https://alibaba.github.io/arthas/arthas-tutorials
|
|
|
version 3.3.6
|
|
|
pid 58883</pre></div>
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|
|
</div>
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</div>
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|
<div class="section" id="id5">
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|
|
<h2>用户数据回报<a class="headerlink" href="#id5" title="永久链接至标题">¶</a></h2>
|
|
|
<p>在<code class="docutils literal notranslate"><span class="pre">3.1.4</span></code>版本后，增加了用户数据回报功能，方便统一做安全或者历史数据统计。</p>
|
|
|
<p>在启动时，指定<code class="docutils literal notranslate"><span class="pre">stat-url</span></code>，就会回报执行的每一行命令，比如： <code class="docutils literal notranslate"><span class="pre">./as.sh</span> <span class="pre">--stat-url</span> <span class="pre">'http://192.168.10.11:8080/api/stat'</span></code></p>
|
|
|
<p>在tunnel server里有一个示例的回报代码，用户可以自己在服务器上实现。</p>
|
|
|
<p><a class="reference external" href="https://github.com/alibaba/arthas/blob/master/tunnel-server/src/main/java/com/alibaba/arthas/tunnel/server/app/web/StatController.java">StatController.java</a></p>
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</div>
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|
<div class="section" id="id6">
|
|
|
<h2>其他特性<a class="headerlink" href="#id6" title="永久链接至标题">¶</a></h2>
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|
<div class="toctree-wrapper compound">
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|
<ul>
|
|
|
<li class="toctree-l1"><a class="reference internal" href="async.html">异步命令支持</a></li>
|
|
|
<li class="toctree-l1"><a class="reference internal" href="save-log.html">执行结果存日志</a></li>
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|
|
<li class="toctree-l1"><a class="reference internal" href="batch-support.html">批处理的支持</a></li>
|
|
|
<li class="toctree-l1"><a class="reference external" href="https://github.com/alibaba/arthas/issues/11">ognl表达式的用法说明</a></li>
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</ul>
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</div>
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</div>
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