Dear everybody, hoping I'm not asking in the wrong channel, I'm facing the following issue and I'm unable to find more information around the web.
This error is raised when I logout from Jenkins, and in general always when the login page is loaded: Mar 16, 2016 9:47:14 AM WARNING hudson.ExtensionFinder$Sezpoz scout Failed to scout com.cloudbees.hudson.plugins.folder.properties.AuthorizationMatrixProperty$DescriptorImpl java.lang.InstantiationException: java.lang.NoClassDefFoundError: com/cloudbees/hudson/plugins/folder/AbstractFolderPropertyDescriptor at net.java.sezpoz.IndexItem.element(IndexItem.java:146) at hudson.ExtensionFinder$Sezpoz.scout(ExtensionFinder.java:667) at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:382) at hudson.ExtensionList.load(ExtensionList.java:349) at hudson.ExtensionList.ensureLoaded(ExtensionList.java:287) at hudson.ExtensionList.iterator(ExtensionList.java:156) at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:381) at hudson.ExtensionList.load(ExtensionList.java:349) at hudson.ExtensionList.ensureLoaded(ExtensionList.java:287) at hudson.ExtensionList.get(ExtensionList.java:171) at hudson.PluginManager$PluginUpdateMonitor.getInstance(PluginManager.java:1261) at hudson.maven.PluginImpl.init(PluginImpl.java:58) 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 hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:106) at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:176) at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282) at jenkins.model.Jenkins$7.runTask(Jenkins.java:905) at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210) at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NoClassDefFoundError: com/cloudbees/hudson/plugins/folder/AbstractFolderPropertyDescriptor at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1139) at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:801) 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.GeneratedMethodAccessor25.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:86) at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:1123) 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) ... 24 more Caused by: java.lang.ClassNotFoundException: com.cloudbees.hudson.plugins.folder.AbstractFolderPropertyDescriptor at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1376) at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1326) at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1079) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 40 more I've checked and the plugin *cloudbees* is not installed in my Jenkins instance, this is confusing me. I've updated all the installed plugin and then upgraded Jenkins to the lastest version: http://updates.jenkins-ci.org/download/war/*1.642.2*/jenkins.war Currently I've no Idea on how to proceed Many thanks for any hint -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/79d8cffb-03d5-43cc-b631-d189d230034d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.