Bug#762798: java.lang.ClassNotFoundException: hudson/matrix/MatrixBuild

[Philipp Marek]

> This is the trace for the ClassNotFoundException, do you still have the
> one for the ClassCastException?
Oh sorry.

Yes, I found it in my screen backlog:

java.lang.ClassCastException: java.util.Vector cannot be cast to hudson.util.DescribableList
        at hudson.model.AbstractProject.triggers(AbstractProject.java:339)
        at hudson.model.AbstractProject.onLoad(AbstractProject.java:322)
        at hudson.model.Project.onLoad(Project.java:90)
        at hudson.model.Items.load(Items.java:273)
        at hudson.model.ItemGroupMixIn$4.call(ItemGroupMixIn.java:258)
        at hudson.model.ItemGroupMixIn$4.call(ItemGroupMixIn.java:256)
        at hudson.model.Items.whileUpdatingByXml(Items.java:84)
        at hudson.model.ItemGroupMixIn.createProjectFromXML(ItemGroupMixIn.java:256)
        at jenkins.model.Jenkins.createProjectFromXML(Jenkins.java:2967)
        at hudson.cli.CreateJobCommand.run(CreateJobCommand.java:73)
        at hudson.cli.CLICommand.main(CLICommand.java:234)
        at hudson.cli.CliManagerImpl.main(CliManagerImpl.java:92)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:309)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:290)
        at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:249)
        at hudson.remoting.UserRequest.perform(UserRequest.java:118)
        at hudson.remoting.UserRequest.perform(UserRequest.java:48)
        at hudson.remoting.Request$2.run(Request.java:328)
        at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
        at hudson.cli.CliManagerImpl$1.call(CliManagerImpl.java:63)
        at hudson.remoting.InterceptingExecutorService$2.call(InterceptingExecutorService.java:95)
        at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)