Hi folks,

I upgraded our Jenkins Installation from 1.489 directly to the current version 1.520.

Whenever I start an job using maven 3 for building the job starts and fails at once with the following exception.

As you can see we're using a IBM Websphere 7 JDK to build, which we must by customer specification.

I tried it with an other Maven version but it's the same from 3.0.3 through 3.0.5...

[TestDrive-CI] $ /opt/IBM/WebSphere/AppServer7/java/bin/java -Djava.awt.headless=true -Duser.language=de -Duser.country=DE -Djava.awt.headless=true -cp /home/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.3.jar:/home/jenkins/apache-maven-3.0.3/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /home/jenkins/apache-maven-3.0.3 /home/jenkins/apache-tomcat-6.0.33/webapps/ROOT/WEB-INF/lib/remoting-2.24.jar /home/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.3.jar 58820
<===[JENKINS REMOTING CAPACITY]===>channel started
ERROR: Failed to parse POMs
java.io.InvalidClassException: hudson.maven.PlexusModuleContributor$1; local class incompatible: stream classdesc serialVersionUID = -647770169695782116, local class serialVersionUID = -6081063417562077289
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:630)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1600)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1513)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1749)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:365)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:182)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:326)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
at java.util.concurrent.FutureTask.run(FutureTask.java:149)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
at java.lang.Thread.run(Thread.java:738)
Sending e-mails to: xxxxx yyyyy
Finished: FAILURE

Any help is highly appreciated. Many thanks in advance,
Thomas