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幾個月前，我在CENTOS 6.8服務器上安裝了Jenkins v.2.6，並且自上週以來所有工作都按預期工作，只是停止工作。詹金斯不工作，無法登錄，卡住然後超時
如果我去http://mydomain:8081，登錄頁面不會再加載，並給我HTTP 503錯誤HTTP錯誤：503訪問/登錄問題。原因：服務不可用。
我檢查端口8081，它仍在監聽，檢查Jenkins服務的狀態，它使用指定的PID＃正常運行。
我沒有檢查Jenkins日誌，看到下面的消息，我不知道如何修復它，試着在Jenkins配置文件中添加--prefix/Jenkins作爲參數和127.0.0.1，就像其他線程建議的一樣，但沒有一個工作。
即使重新啓動服務器，仍然無法正常工作。
任何人都可以幫忙嗎？
感謝，
詹金斯日誌文件
Running from: /usr/lib/jenkins/jenkins.war
Apr 17, 2017 3:10:21 PM Main deleteWinstoneTempContents
WARNING: Failed to delete the temporary Winstone file /tmp/winstone/jenkins.war
Apr 17, 2017 3:10:22 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Logging initialized @1304ms
Apr 17, 2017 3:10:22 PM winstone.Logger logInternal
INFO: Beginning extraction from war file
Apr 17, 2017 3:10:22 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: Empty contextPath
Apr 17, 2017 3:10:22 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: jetty-9.2.z-SNAPSHOT
Apr 17, 2017 3:10:24 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet
Apr 17, 2017 3:10:25 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: Failed startup of context [email protected]{/,file:/var/cache/jenkins/war/,STARTING}{/var/cache/jenkins/war}
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.eclipse.jetty.webapp.IterativeDescriptorProcessor.visit(IterativeDescriptorProcessor.java:85)
at org.eclipse.jetty.webapp.IterativeDescriptorProcessor.process(IterativeDescriptorProcessor.java:72)
at org.eclipse.jetty.webapp.MetaData.resolve(MetaData.java:408)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1340)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
at org.eclipse.jetty.server.Server.start(Server.java:387)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
at org.eclipse.jetty.server.Server.doStart(Server.java:354)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at winstone.Launcher.<init>(Launcher.java:152)
at winstone.Launcher.main(Launcher.java:352)
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 Main._main(Main.java:264)
at Main.main(Main.java:112)
Caused by: java.lang.UnsupportedClassVersionError: jenkins/util/SystemProperties : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:510)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:441)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:403)
at org.eclipse.jetty.server.handler.ContextHandler.loadClass(ContextHandler.java:1583)
at org.eclipse.jetty.webapp.StandardDescriptorProcessor.visitListener(StandardDescriptorProcessor.java:1956)
... 25 more
Apr 17, 2017 3:10:25 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Started [email protected]{HTTP/1.1}{0.0.0.0:8081}
Apr 17, 2017 3:10:25 PM org.eclipse.jetty.util.log.JavaUtilLog info
安裝JDK 1.8的所有工作正常後幾個小時，所有突然我得到了超時沒有任何HTTP錯誤消息這一次。
我再次檢查了JENKINS日誌，這是它這次顯示的內容。
Running from: /usr/lib/jenkins/jenkins.war
Apr 18, 2017 8:53:27 PM Main deleteWinstoneTempContents
WARNING: Failed to delete the temporary Winstone file /tmp/winstone/jenkins.war
Apr 18, 2017 8:53:27 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Logging initialized @861ms
Apr 18, 2017 8:53:27 PM winstone.Logger logInternal
INFO: Beginning extraction from war file
Apr 18, 2017 8:53:27 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: Empty contextPath
Apr 18, 2017 8:53:27 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: jetty-9.2.z-SNAPSHOT
Apr 18, 2017 8:53:28 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet
Jenkins home directory: /data/jenkins found at: SystemProperties.getProperty("JENKINS_HOME")
Apr 18, 2017 8:53:29 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Started [email protected]{/,file:/var/cache/jenkins/war/,AVAILABLE}{/var/cache/jenkins/war}
Apr 18, 2017 8:53:29 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Started [email protected]{HTTP/1.1}{0.0.0.0:8081}
Apr 18, 2017 8:53:29 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Started @2826ms
Apr 18, 2017 8:53:29 PM winstone.Logger logInternal
INFO: Winstone Servlet Engine v2.0 running: controlPort=disabled
Apr 18, 2017 8:53:30 PM jenkins.InitReactorRunner$1 onAttained
INFO: Started initialization
Apr 18, 2017 8:53:30 PM jenkins.InitReactorRunner$1 onAttained
INFO: Listed all plugins
Apr 18, 2017 8:53:30 PM jenkins.bouncycastle.api.SecurityProviderInitializer addSecurityProvider
INFO: Initializing Bouncy Castle security provider.
Apr 18, 2017 8:53:30 PM jenkins.bouncycastle.api.SecurityProviderInitializer addSecurityProvider
INFO: Bouncy Castle security provider initialized.
Apr 18, 2017 8:53:38 PM jenkins.InitReactorRunner$1 onAttained
INFO: Prepared all plugins
Apr 18, 2017 8:53:38 PM jenkins.InitReactorRunner$1 onAttained
INFO: Started all plugins
Apr 18, 2017 8:53:40 PM hudson.ExtensionFinder$GuiceFinder$FaultTolerantScope$1 error
INFO: Failed to instantiate optional component hudson.plugins.build_timeout.operations.AbortAndRestartOperation$DescriptorImpl; skipping
Apr 18, 2017 8:53:40 PM org.jenkinsci.plugins.dockerbuildstep.DockerBuilder$DescriptorImpl <init>
WARNING: Docker URL is not set, docker client won't be initialized
Apr 18, 2017 8:53:41 PM jenkins.InitReactorRunner$1 onAttained
INFO: Augmented all extensions
Apr 18, 2017 8:53:42 PM jenkins.InitReactorRunner$1 onAttained
INFO: Loaded all jobs
Apr 18, 2017 8:53:42 PM hudson.model.AsyncPeriodicWork$1 run
INFO: Started Download metadata
任何人都可以幫助我嗎？正如我所說的，在將JDK升級到1.8並且在幾個小時內創建了10多個版本之後，它就可以工作，然後再次停止工作。
謝謝，
https://issues.jenkins-ci.org/browse/JENKINS-43492。這似乎是一個實時問題。檢查最後2條評論 - 看起來應該已經修復（或即將推出）。 – Aaron
'UnsupportedClassVersionError'幾乎肯定意味着安裝的二進制文件與Java VM的版本不匹配。所以請確保您安裝了正確的Java版本。 –
正如我所說，謝謝，我已經這麼做了，除非它自動更新到新版本，並且需要更新版本的VM？它現在在java版本「1.7.0_51」上。我如何檢查Jenkins版本？ –