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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 href="/en/doc/version.html" class="sidebar-item" aria-label="version"><!--[--><!--]--> version <!--[--><!--]--></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/watch.html" class="sidebar-item" aria-label="watch"><!--[--><!--]--> watch <!--[--><!--]--></a><!----></li><!--]--></ul></li><li><a href="/en/doc/advanced-use.md" class="sidebar-item collapsible" aria-label="Other features"><!--[--><!--]--> Other features <!--[--><!--]--></a><ul style="display:none;" 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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" 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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-64666cd5><div class="right-menu-margin" data-v-64666cd5><div class="right-menu-title" data-v-64666cd5>Table of Contents</div><div class="right-menu-content" data-v-64666cd5><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h1 id="options" tabindex="-1"><a class="header-anchor" href="#options" aria-hidden="true">#</a> options</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=en&amp;id=command-options" target="_blank" rel="noopener noreferrer"><code>options</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><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>Global options</p></div><table><thead><tr><th>Name</th><th>Default Value</th><th>Description</th></tr></thead><tbody><tr><td>unsafe</td><td>false</td><td>whether to enhance to system-level class. Use it with caution since JVM may hang</td></tr><tr><td>dump</td><td>false</td><td>whether to dump enhanced class to the external files. If it&#39;s on, enhanced class will be dumped into <code>/${application dir}/arthas-class-dump/</code>, the specific output path will be output in the console</td></tr><tr><td>batch-re-transform</td><td>true</td><td>whether to re-transform matched classes in batch</td></tr><tr><td>json-format</td><td>false</td><td>whether to output in JSON format</td></tr><tr><td>disable-sub-class</td><td>false</td><td>whether to enable matching child classes. The default value is <code>true</code>. If exact match is desire, turn off this flag</td></tr><tr><td>support-default-method</td><td>true</td><td>whether to enable matching default method in interface. The default value is <code>true</code>. Refer to <a href="https://github.com/alibaba/arthas/issues/1105" target="_blank" rel="noopener noreferrer">#1105<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></td></tr><tr><td>save-result</td><td>false</td><td>whether to save execution result. All execution results will be saved to <code>~/logs/arthas-cache/result.log</code> when it&#39;s turned on</td></tr><tr><td>job-timeout</td><td>1d</td><td>default timeout for background jobs. Background job will be terminated once it&#39;s timed out (i.e. 1d, 2h, 3m, 25s)</td></tr><tr><td>print-parent-fields</td><td>true</td><td>This option enables print files in parent class, default value true.</td></tr><tr><td>verbose</td><td>false</td><td>This option enables print verbose information</td></tr><tr><td>strict</td><td>true</td><td>whether to enable strict mode</td></tr></tbody></table><h2 id="view-all-options" tabindex="-1"><a class="header-anchor" href="#view-all-options" aria-hidden="true">#</a> View all options</h2><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ options
LEVEL TYPE NAME VALUE SUMMARY DESCRIPTION
-------------------------------------------------------------------------------------------------------
<span class="token number">0</span> boolea unsafe <span class="token boolean">false</span> Option to support sy This option enables to proxy functionality
n stem-level class of JVM classes. Due to serious security r
isk a JVM crash is possibly be introduced.
Do not activate it unless you are able to
manage.
<span class="token number">1</span> boolea dump <span class="token boolean">false</span> Option to dump the e This option enables the enhanced classes t
n nhanced classes o be dumped to external <span class="token function">file</span> <span class="token keyword">for</span> further d
e-compilation and analysis.
<span class="token number">1</span> boolea batch-re-tra <span class="token boolean">true</span> Option to support ba This options enables to reTransform classe
n nsform tch reTransform Clas s with batch mode.
s
<span class="token number">2</span> boolea json-format <span class="token boolean">false</span> Option to support JS This option enables to <span class="token function">format</span> object outpu
n ON <span class="token function">format</span> of object t with JSON when <span class="token parameter variable">-x</span> option selected.
output
<span class="token number">1</span> boolea disable-sub- <span class="token boolean">false</span> Option to control <span class="token keyword">in</span> This option disable to include sub class w
n class clude sub class when hen matching class.
class matching
<span class="token number">1</span> boolea support-defa <span class="token boolean">true</span> Option to control <span class="token keyword">in</span> This option disable to include default met
n ult-method clude default method hod <span class="token keyword">in</span> interface when matching class.
<span class="token keyword">in</span> interface when c
lass matching
<span class="token number">1</span> boolea save-result <span class="token boolean">false</span> Option to print <span class="token function">comm</span> This option enables to save each <span class="token builtin class-name">command</span><span class="token string">&#39;s
n and&#39;</span>s result to log result to log file, <span class="token function">which</span> path is <span class="token variable">${user.
file home}</span>/logs/arthas-cache/result.log.
<span class="token number">2</span> String job-timeout 1d Option to job timeou This option setting job timeout,The unit c
t an be d, h, m, s <span class="token keyword">for</span> day, hour, minute, se
cond. 1d is one day <span class="token keyword">in</span> default
<span class="token number">1</span> boolea print-parent <span class="token boolean">true</span> Option to print all This option enables print files <span class="token keyword">in</span> parent
n <span class="token parameter variable">-fields</span> fileds <span class="token keyword">in</span> parent cla class, default value true.
ss
<span class="token number">1</span> boolea verbose <span class="token boolean">false</span> Option to print verb This option enables print verbose informat
n ose information ion, default value false.
<span class="token number">1</span> boolea strict <span class="token boolean">true</span> Option to strict mod By default, strict mode is true, not allow
n e ed to <span class="token builtin class-name">set</span> object properties. Want to <span class="token builtin class-name">set</span> o
bject properties, execute <span class="token variable"><span class="token variable">`</span>options strict
<span class="token boolean">false</span><span class="token variable">`</span></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 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><h2 id="get-special-option-value" tabindex="-1"><a class="header-anchor" href="#get-special-option-value" aria-hidden="true">#</a> Get special option value</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ options json-format
LEVEL TYPE NAME VALUE SUMMARY DESCRIPTION
--------------------------------------------------------------------------------------------
2 bool json-format false Option to support This option enables to format object
ean JSON format of obj output with JSON when -x option selec
ect output ted.
</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></div><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>By default, <code>json-format</code> is false. When set <code>json-format</code> to true, commands like <code>wathc</code>/<code>tt</code> will print result with <code>json</code> format.</p></div><h2 id="set-special-option-value" tabindex="-1"><a class="header-anchor" href="#set-special-option-value" aria-hidden="true">#</a> Set special option value</h2><p>For example, to enable saving command execution result, input the command below:</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ options save-result true
NAME BEFORE-VALUE AFTER-VALUE
----------------------------------------
save-result false true
</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></div><h2 id="set-unsafe-to-true-to-enhance-the-classes-under-the-java-package" tabindex="-1"><a class="header-anchor" href="#set-unsafe-to-true-to-enhance-the-classes-under-the-java-package" aria-hidden="true">#</a> Set <code>unsafe</code> to true to enhance the classes under the <code>java.*</code> package</h2><p>By default, <code>watch</code>/<code>trace</code>/<code>tt</code>/<code>trace</code>/<code>monitor</code> command do not support classes under <code>java.*</code> package. You can set <code>unsafe</code> to true to enhance the classes under the <code>java.*</code> package.</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ options unsafe <span class="token boolean">true</span>
NAME BEFORE-VALUE AFTER-VALUE
-----------------------------------
unsafe <span class="token boolean">false</span> <span class="token boolean">true</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></div><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ <span class="token function">watch</span> java.lang.invoke.Invokers callSiteForm
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">61</span> ms, listenerId: <span class="token number">1</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></div><h2 id="turn-off-strict-mode-allow-setting-object-properties-in-ognl-expressions" tabindex="-1"><a class="header-anchor" href="#turn-off-strict-mode-allow-setting-object-properties-in-ognl-expressions" aria-hidden="true">#</a> Turn off strict mode, allow setting object properties in ognl expressions</h2><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>since 3.6.0</p></div><p>For new users, there may be misuses when writing ognl expressions.</p><p>For example, for <code>Student</code>, when judging the age is equal to 18, the conditional expression may be mistakenly written as <code>target.age=18</code>, which actually sets the <code>age</code> of the current object to 18. The correct spelling is <code>target.age==18</code>.</p><p>In order to prevent misuse like the above, Arthas enables <code>strict</code> mode by default, in <code>ognl</code> expressions, it is forbidden to update the property of the object or call the <code>setter</code> method.</p><p>Take <code>MathGame</code> as an example, the following error message will appear.</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ watch demo.MathGame primeFactors &#39;target&#39; &#39;target.illegalArgumentCount=1&#39;
Press Q or Ctrl+C to abort.
Affect(class count: 1 , method count: 1) cost in 206 ms, listenerId: 1
watch failed, condition is: target.illegalArgumentCount=1, express is: target, By default, strict mode is true, not allowed to set object properties. Want to set object properties, execute `options strict false`, visit /Users/admin/logs/arthas/arthas.log for more details.
</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></div><p>If the user want to change the object properties in the <code>ognl</code> expression, you can execute <code>options strict false</code> to turn off the <code>strict</code> mode.</p><ul><li>For more information, please refer to: https://github.com/alibaba/arthas/issues/2128</li></ul></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/options.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: 43456743+alfredzouang@users.noreply.github.com">alfredzouang</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: ian.luo@gmail.com">beiwei30</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav right-menu-padding" data-v-fdd717e0><p class="inner"><span class="prev"><a href="/en/doc/ognl.html" class="" aria-label="ognl"><!--[--><!--]--> ognl <!--[--><!--]--></a></span><span class="next"><a href="/en/doc/perfcounter.html" class="" aria-label="perfcounter"><!--[--><!--]--> perfcounter <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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