Version 1.411 works fine, upgrade to 1.412 breaks jenkins. The webconsole does not open anymore (I run it behind apache2 proxy, but direct access doesn't work either). Top shows that it keeps adding jenkins processes (/usr/bin/java -jar /usr/share/jenkins/jenkins.war --webroot=/var/run/jenkins/war --httpPort=8080 --ajp13Port=-1 ), one is always running at ~65% CPU all the time. I had it running for a while now but the webinterface doesn't come up. My solution was to reverted to the previous version, that version worked great anyway.

The following appears in the log:

Running from: /usr/share/jenkins/jenkins.war
[Winstone 2011/05/17 20:10:38] - Beginning extraction from war file
hudson home directory: /var/lib/jenkins found at: EnvVars.masterEnvVars.get("JENKINS_HOME")
[Winstone 2011/05/17 20:10:40] - HTTP Listener started: port=8080
Using one-time self-signed certificate
17-May-2011 20:10:41 hudson.model.Hudson$5 onAttained
INFO: Started initialization
[Winstone 2011/05/17 20:10:41] - Winstone Servlet Engine v0.9.10 running: controlPort=disabled
17-May-2011 20:10:42 hudson.model.Hudson$5 onAttained
INFO: Listed all plugins
17-May-2011 20:10:42 hudson.plugins.greenballs.PluginImpl start
INFO: Green Balls!
17-May-2011 20:10:46 hudson.model.Hudson$5 onAttained
INFO: Prepared all plugins
17-May-2011 20:15:20 hudson.model.Hudson$5 onTaskFailed
SEVERE: Failed Initializing plugin git
java.lang.StackOverflowError
at java.lang.StringCoding.deref(StringCoding.java:64)
at java.lang.StringCoding.encode(StringCoding.java:276)
at java.lang.String.getBytes(String.java:954)
at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:243)
at java.io.File.exists(File.java:750)
at sun.misc.URLClassPath$FileLoader.getResource(URLClassPath.java:999)
at sun.misc.URLClassPath.getResource(URLClassPath.java:185)
at java.net.URLClassLoader$1.run(URLClassLoader.java:209)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at winstone.classLoader.WebappClassLoader.loadClass(WebappClassLoader.java:68)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:426)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:641)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:641)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at net.java.sezpoz.IndexItem.element(IndexItem.java:134)
at hudson.ExtensionFinder$Sezpoz.scout(ExtensionFinder.java:204)
at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:277)
at hudson.ExtensionList.load(ExtensionList.java:237)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:208)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)
at java.util.Collections.sort(Collections.java:134)
at hudson.ExtensionList.sort(ExtensionList.java:249)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:210)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)
at java.util.Collections.sort(Collections.java:134)
at hudson.ExtensionList.sort(ExtensionList.java:249)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:210)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)

repeats ...

at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)
at java.util.Collections.sort(Collections.java:134)
at hudson.ExtensionList.sort(ExtensionList.java:249)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:210)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)
at java.util.Collections.sort(Collections.java:134)
at hudson.ExtensionList.sort(ExtensionList.java:249)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:210)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)
at java.util.Collections.sort(Collections.java:134)
17-May-2011 20:15:20 hudson.model.Hudson$5 onAttained
INFO: Started all plugins
17-May-2011 20:15:20 hudson.model.Hudson$5 onAttained
INFO: Augmented all extensions
[Winstone 2011/05/17 20:19:51] - Untrapped Error in Servlet

Looking at the log above, it seems like it's the git plugin. But it happens at other places, too for example this noon, the error looked like this:

INFO: Started all plugins
17-May-2011 12:53:11 hudson.model.Hudson$5 onAttained
INFO: Augmented all extensions
17-May-2011 12:57:38 hudson.model.Hudson$5 onTaskFailed
SEVERE: Failed NullIdDescriptorMonitor.verifyId
java.lang.Error: java.lang.reflect.InvocationTargetException
at hudson.init.InitializerFinder.invoke(InitializerFinder.java:114)
at hudson.init.InitializerFinder$TaskImpl.run(InitializerFinder.java:174)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at hudson.model.Hudson$4.runTask(Hudson.java:735)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at hudson.init.InitializerFinder.invoke(InitializerFinder.java:110)
... 8 more
Caused by: java.lang.StackOverflowError
at java.lang.ClassLoader.findBootstrapClass(Native Method)
at java.lang.ClassLoader.findBootstrapClass0(ClassLoader.java:900)
at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at winstone.classLoader.WebappClassLoader.loadClass(WebappClassLoader.java:55)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.ClassicPluginStrategy$DependencyClassLoader.findClass(ClassicPluginStrategy.java:426)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:641)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at net.java.sezpoz.IndexItem.element(IndexItem.java:134)
at hudson.ExtensionFinder$Sezpoz.scout(ExtensionFinder.java:204)
at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:277)
at hudson.ExtensionList.load(ExtensionList.java:237)
at hudson.ExtensionList.ensureLoaded(ExtensionList.java:208)
at hudson.ExtensionList.iterator(ExtensionList.java:115)
at hudson.model.Hudson.getDescriptorByType(Hudson.java:1003)
at hudson.tasks.Mailer.descriptor(Mailer.java:143)
at hudson.model.Hudson.getRootUrl(Hudson.java:1806)
at hudson.plugins.clover.CloverBuildWrapper$DescriptorImpl.getDisplayName(CloverBuildWrapper.java:122)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:80)
at hudson.ExtensionComponent.compareTo(ExtensionComponent.java:36)
at java.util.Arrays.mergeSort(Arrays.java:1157)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1168)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.mergeSort(Arrays.java:1169)
at java.util.Arrays.sort(Arrays.java:1092)

etc ...

If you need anything else, just ask.