公司內網測試jenkins服務器，最近總是出現PermGen space（內存溢出）的問題，解決過程記錄如下

1、重啟jenkins查看日誌：

3, 2017 10:54:54 udson.ExtensionFinder$Sezpoz _find
WARNING: Failed to load org.jenkinsci.plugins.github.pullrequest.events.impl.GitHubPRLabelExistsEvent$DescriptorImpl
java.lang.InstantiationException: java.lang.UnsupportedClassVersionError: org/jenkinsci/plugins/github/pullrequest/events/impl/GitHubPRLabelExistsEvent$DescriptorImpl : Unsupported major.minor ve
rsion 52.0
        at net.java.sezpoz.IndexItem.element(IndexItem.java:146)
        at hudson.ExtensionFinder$Sezpoz._find(ExtensionFinder.java:620)
        at hudson.ExtensionFinder$Sezpoz.find(ExtensionFinder.java:609)
        at hudson.ExtensionFinder$GuiceFinder.<init>(ExtensionFinder.java:257)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at java.lang.Class.newInstance(Class.java:374)
        at net.java.sezpoz.IndexItem.instance(IndexItem.java:181)
        at hudson.ExtensionFinder$Sezpoz._find(ExtensionFinder.java:634)
        at hudson.ExtensionFinder$Sezpoz.find(ExtensionFinder.java:609)
        at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:471)
        at hudson.ExtensionList.load(ExtensionList.java:349)
        at hudson.ExtensionList.ensureLoaded(ExtensionList.java:287)
        at hudson.ExtensionList.getComponents(ExtensionList.java:167)
        at jenkins.model.Jenkins$8.onInitMilestoneAttained(Jenkins.java:1016)
        at jenkins.InitReactorRunner$1.onAttained(InitReactorRunner.java:80)
        at org.jvnet.hudson.reactor.ReactorListener$Aggregator.onAttained(ReactorListener.java:104)
        at org.jvnet.hudson.reactor.Reactor$1.run(Reactor.java:176)
        at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedClassVersionError: org/jenkinsci/plugins/github/pullrequest/events/impl/GitHubPRLabelExistsEvent$DescriptorImpl : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
        at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1139)
        at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:878)
        at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1310)
        at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1366)
        at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1326)
        at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at jenkins.ClassLoaderReflectionToolkit.invoke(ClassLoaderReflectionToolkit.java:44)
        at jenkins.ClassLoaderReflectionToolkit._findClass(ClassLoaderReflectionToolkit.java:81)
        at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:1738)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at net.java.sezpoz.IndexItem.element(IndexItem.java:134)

發現了大量的有關github-pullrequest插件版本的報錯，懷疑是因為插件版本問題導致的，於是乎卸載了這個插件。重啟jenkins

問題依舊，啟動日誌報大量的這個插件的問題，然後各種百度沒有找到解決方案，仔細查看日誌的報錯位置，然後使用find在系統中搜索插件的名字

[[email protected] ~]# find / -name github
/root/.jenkins/plugins/github
/root/.jenkins/plugins/github/META-INF/maven/com.coravy.hudson.plugins.github/github
/root/.m2/repository/com/github

然後進入到jenkins的主目錄的plugins目錄中，刪除pull-requests目錄和pull-requests.jpi 文件，重啟jenkins，問題解決。

這次雖然不報版本錯誤了，但是在執行jenkins構建時，還是會出現內存溢出現象。經過觀察發現，內存溢出一定是多次構建失敗才會出現。日誌報錯：

INFO: XXXXXXXXXXX #14 main build action completed: FAILURE
3, 2017 11:04:15 udson.model.Run execute
INFO: XXXXXXXXXXX #13 main build action completed: FAILURE
3, 2017 11:05:05 udson.model.Run execute
INFO: XXXXXXXXXXX #5 main build action completed: SUCCESS
3, 2017 11:06:38 udson.model.Run execute
INFO: XXXXXXXXXXX #15 main build action completed: FAILURE
3, 2017 11:13:45 udson.model.Run execute
INFO: XXXXXXXXXXX #16 main build action completed: FAILURE
3, 2017 11:26:20 udson.model.Run execute
INFO: XXXXXXXXXXX #17 main build action completed: FAILURE
3, 2017 11:28:23 udson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: instance[name] ?: attrs.default in /jenkins/configure. Reason: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
        at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
        at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
        at org.apache.commons.jexl.parser.ASTArrayAccess.value(ASTArrayAccess.java:118)
        at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:77)
        at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)
        at org.apache.commons.jexl.parser.ASTElvisNode.value(ASTElvisNode.java:37)
        at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:54)
        at org.apache.commons.jexl.parser.ASTExpressionExpression.value(ASTExpressionExpression.java:56)
        at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)
        at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$3.run(CoreTagLibrary.java:134)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:95)
        at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:147)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.OtherwiseTag.doTag(OtherwiseTag.java:41)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:150)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:95)
        at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:63)
        at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:53)
        at org.kohsuke.stapler.jelly.JellyFacet$1.dispatch(JellyFacet.java:95)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
        at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:126)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
        at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
        at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
        at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
        at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
        at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:612)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.OutOfMemoryError: PermGen space
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
        at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1139)
        at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:878)
        at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1310)
        at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1366)
        at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1326)
        at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1079)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at org.skife.jdbi.v2.sqlobject.SqlObject.<clinit>(SqlObject.java:38)
        at org.skife.jdbi.v2.sqlobject.SqlObjectBuilder.attach(SqlObjectBuilder.java:38)
        at org.skife.jdbi.v2.BasicHandle.attach(BasicHandle.java:408)
        at com.epam.jenkins.deployment.sphere.plugin.metadata.persistence.dao.ApplicationDao.findAll(ApplicationDao.java:38)
        at com.epam.jenkins.deployment.sphere.plugin.GlobalJobProperty$CustomViewsTabBarDescriptor.getApplications(GlobalJobProperty.java:69)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
        at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
        at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
        at org.apache.commons.jexl.parser.ASTArrayAccess.value(ASTArrayAccess.java:118)
        at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:77)
        at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)
        at org.apache.commons.jexl.parser.ASTElvisNode.value(ASTElvisNode.java:37)
        at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:54)
        at org.apache.commons.jexl.parser.ASTExpressionExpression.value(ASTExpressionExpression.java:56)
        at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)
        at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$3.run(CoreTagLibrary.java:134)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)

3, 2017 11:28:25 udson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: instance[name] ?: attrs.default in /jenkins/configure. Reason: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
        at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
        at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
        at org.apache.commons.jexl.parser.ASTArrayAccess.value(ASTArrayAccess.java:118)
        at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:77)
        at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)
        at org.apache.commons.jexl.parser.ASTElvisNode.value(ASTElvisNode.java:37)
        at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:54)
        at org.apache.commons.jexl.parser.ASTExpressionExpression.value(ASTExpressionExpression.java:56)
        at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)
        at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$3.run(CoreTagLibrary.java:134)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
        at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:120)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:99)
        at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)
        at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)
        at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
        at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
        at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

2、查看系統狀態

發現jenkins的進程占用內存大，系統負載高。

3、對jenkins進行調優

catalina.sh加入參數

JAVA_OPTS="-server -Xms1024m -Xmx2048m -XX:PermSize=256m -XX:MaxPermSize=512m"

重啟jenkins之後觀察內存溢出問題依舊

4、將外網測試的jenkins取項目取到內網服務器上，啟動jenkins，觀察2個小時，內存溢出問題解決。

總結：外網測試的jenkins版本和內網的一樣，所以目前也不清楚到底是什麽原因導致的內存溢出。百度之後的結果也不盡人意。。。

本文出自 “初心、始終” 博客，謝絕轉載！

jenkins內存溢出的一些解決過程