公司内网测试jenkins服务器，最近总是出现PermGen space（内存溢出）的问题，解决过程记录如下
1、重启jenkins查看日志：
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)
发现了大量的有关github-pullrequest插件版本的报错，怀疑是因为插件版本问题导致的，于是乎卸载了这个插件。重启jenkins
问题依旧，启动日志报大量的这个插件的问题，然后各种百度没有找到解决方案，仔细查看日志的报错位置，然后使用find在系统中搜索插件的名字
[root@phtfdata20 ~]# 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
然后进入到jenkins的主目录的plugins目录中，删除pull-requests目录和pull-requests.jpi 文件，重启jenkins，问题解决。
这次虽然不报版本错误了，但是在执行jenkins构建时，还是会出现内存溢出现象。经过观察发现，内存溢出一定是多次构建失败才会出现。日志报错：
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、查看系统状态
发现jenkins的进程占用内存大，系统负载高。
3、对jenkins进行调优
catalina.sh加入参数
JAVA_OPTS="-server -Xms1024m -Xmx2048m -XX:PermSize=256m -XX:MaxPermSize=512m"
重启jenkins之后观察内存溢出问题依旧
4、将外网测试的jenkins取项目取到内网服务器上，启动jenkins，观察2个小时，内存溢出问题解决。
总结：外网测试的jenkins版本和内网的一样，所以目前也不清楚到底是什么原因导致的内存溢出。百度之后的结果也不尽人意。。。
本文出自 “初心、始终” 博客，谢绝转载！
原文地址：http://gouyc.blog.51cto.com/1594451/1941395
