Java Project Server CPU usage 100% workaround

Server CPU Consumption 100%

Project on-line after a period of time, suddenly found that the CPU 8 logical core occupies 100%, the mood is very tense, and then on the Internet to find some solutions, specifically as follows:
1. Find out which processes are consuming CPU
Go to the server, top command to see that process 6633 takes up 800%
[email protected] ~]# top
2. Dump the stack of processes into the file so that the subsequent analysis
[email protected] ~]# jstack 23812 >> java.txt

3. See which threads in this process are consuming CPU
[email protected] ~]# top-p 23812-h
A large CPU-intensive thread, choose one of the highest, pid=15362
4. Then look at the dump out of the Java.txt log, there will be 23812 of the process below each thread of the stack information, but is the hexadecimal display, so first convert 5159 to 16 binary
[email protected] ~]# printf%0x 15362
[Email protected] ~]# 3C02
5. Find the PID=3C02 thread in the CPU log

[email protected] ~]# VI java.txt

6. Reasons for Analysis

[[email protected] ~]# grep "3C02" Java.txt

"JS executor for [email protected]" #76858 daemon prio=5 os_prio=0 tid=0x00007f390000b800 nid=0x3c02 runnable [0x00007f3ae 13DB000]

"JS executor for [email protected]" #76858 daemon prio=5 os_prio=0 tid=0x00007f390000b800 nid=0x3c02 runnable [0x00007f3ae 13DB000]

"JS executor for [email protected]" #76858 daemon prio=5 os_prio=0 tid=0x00007f390000b800 nid=0x3c02 Runnab

Java.lang.Thread.State:RUNNABLE

At Java.util.arraylist.<init> (arraylist.java:177)

At Com.gargoylesoftware.htmlunit.html.HtmlPage.safeGetAttributeListeners (htmlpage.java:2222)

-Locked <0x00000005cd622798> (a java.lang.String)

At com.gargoylesoftware.htmlunit.html.HtmlPage.fireHtmlAttributeReplaced (htmlpage.java:2198)

At Com.gargoylesoftware.htmlunit.html.HtmlElement.setAttributeNS (htmlelement.java:213)

At Com.gargoylesoftware.htmlunit.html.DomElement.setAttribute (domelement.java:296)

At Com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.writeToElement ( cssstyledeclaration.java:652)

At Com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.replaceStyleAttribute ( cssstyledeclaration.java:576)

At Com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.setStyleAttribute ( CSSSTYLEDECLARATION.JAVA:550)

At Com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.setZIndex (Cssstyledeclaration.java : 3956)

At Sun.reflect.GeneratedMethodAccessor135.invoke (Unknown Source)

At Sun.reflect.DelegatingMethodAccessorImpl.invoke (delegatingmethodaccessorimpl.java:43)

At Java.lang.reflect.Method.invoke (method.java:497)

At Net.sourceforge.htmlunit.corejs.javascript.MemberBox.invoke (memberbox.java:120)

At Net.sourceforge.htmlunit.corejs.javascript.scriptableobject$getterslot.setvalue (ScriptableObject.java:295)

At Net.sourceforge.htmlunit.corejs.javascript.scriptableobject$relinkedslot.setvalue (ScriptableObject.java:368)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.putImpl (scriptableobject.java:2796)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.put (scriptableobject.java:521)

At Com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.put (cssstyledeclaration.java:2407)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.putProperty (scriptableobject.java:2479)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.setObjectProp (scriptruntime.java:1574)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.setObjectProp (scriptruntime.java:1569)

At Net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop (interpreter.java:1253)

At Net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret (interpreter.java:798)

At Net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call (interpretedfunction.java:105)

At Net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall (contextfactory.java:411)

At Com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall (htmlunitcontextfactory.java:309)

At Net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall (scriptruntime.java:3057)

At Net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec (interpretedfunction.java:115)

At Com.gargoylesoftware.htmlunit.javascript.javascriptengine$3.dorun (javascriptengine.java:566)

At Com.gargoylesoftware.htmlunit.javascript.javascriptengine$htmlunitcontextaction.run (JavaScriptEngine.java : 674)

-Locked <0x00000005cd2f5a08> (a com.gargoylesoftware.htmlunit.html.HtmlPage)

At Net.sourceforge.htmlunit.corejs.javascript.Context.call (context.java:620)

At Net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call (contextfactory.java:513)

At Com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute (javascriptengine.java:575)

At Com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute (javascriptengine.java:550)

At Com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptIfPossible (htmlpage.java:971)

At Com.gargoylesoftware.htmlunit.javascript.background.JavaScriptStringJob.runJavaScript ( JAVASCRIPTSTRINGJOB.JAVA:50)

At Com.gargoylesoftware.htmlunit.javascript.background.JavaScriptExecutionJob.run (Javascriptexecutionjob.java : 102)

At Com.gargoylesoftware.htmlunit.javascript.background.JavaScriptJobManagerImpl.runSingleJob ( javascriptjobmanagerimpl.java:328)

At Com.gargoylesoftware.htmlunit.javascript.background.DefaultJavaScriptExecutor.run ( defaultjavascriptexecutor.java:162)

At Java.lang.Thread.run (thread.java:745)

Find the problem and let Java development troubleshoot

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Java Project Server CPU usage 100% workaround