Failed to scout for extension points

gistfile1.txt

Nov 13, 2012 1:27:52 PM hudson.ExtensionFinder$Sezpoz scout
WARNING: Failed to scout javaposse.jobdsl.plugin.SeedJobsPropertyDescriptor
java.lang.InstantiationException: file:/apps/builds/test-jenkins/plugins/job-dsl/WEB-INF/classes/META-INF/annotations/hudson.Extension might need to be rebuilt: java.lang.ClassNotFoundException: javaposse.jobdsl.plugin.SeedJobsPropertyDescriptor
        at net.java.sezpoz.IndexItem.element(IndexItem.java:144)
        at hudson.ExtensionFinder$Sezpoz.scout(ExtensionFinder.java:644)
        at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:283)
        at hudson.ExtensionList.load(ExtensionList.java:278)
        at hudson.ExtensionList.ensureLoaded(ExtensionList.java:231)
        at hudson.ExtensionList.iterator(ExtensionList.java:138)
        at hudson.ClassicPluginStrategy.findComponents(ClassicPluginStrategy.java:282)
        at hudson.ExtensionList.load(ExtensionList.java:278)
        at hudson.ExtensionList.ensureLoaded(ExtensionList.java:231)
        at hudson.ExtensionList.getComponents(ExtensionList.java:149)
        at hudson.DescriptorExtensionList.load(DescriptorExtensionList.java:182)
        at hudson.ExtensionList.ensureLoaded(ExtensionList.java:231)
        at hudson.ExtensionList.iterator(ExtensionList.java:138)
        at org.jenkinsci.plugins.xunit.AliasInitializer.addAliases(AliasInitializer.java:23)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at hudson.init.InitializerFinder.invoke(InitializerFinder.java:120)
        at hudson.init.InitializerFinder$TaskImpl.run(InitializerFinder.java:184)
        at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
        at jenkins.model.Jenkins$6.runTask(Jenkins.java:839)
        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$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: javaposse.jobdsl.plugin.SeedJobsPropertyDescriptor
        at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:767)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        at net.java.sezpoz.IndexItem.element(IndexItem.java:134)
        ... 26 more