[jboss-user] [jBPM] - Console Process execution FAIL: UnsupportedClassVersionError

[Karoy Labs]

Karoy Labs [http://community.jboss.org/people/obolabs] created the discussion

"Console Process execution FAIL: UnsupportedClassVersionError"

To view the discussion, visit: http://community.jboss.org/message/559915#559915

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JBPM 4.4 with JDK 1.5.8

Process built with Ant in Eclipse, where everybody is using the same JDK as JBoss.

After deploying a very simple process, the process is executed in the BPM Console by selecting 'Start' in the Process Overview. It fails with this error:
UnsupportedClassVersionError: Bad version number in .class file
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:465)
    at org.jbpm.pvm.internal.repository.DeploymentClassLoader.findClass(DeploymentClassLoader.java:113)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:242)
    at org.jbpm.pvm.internal.util.ReflectUtil.classForName(ReflectUtil.java:434)
    at org.jbpm.pvm.internal.wire.descriptor.ObjectDescriptor.construct(ObjectDescriptor.java:141)
    at org.jbpm.pvm.internal.wire.WireContext.construct(WireContext.java:487)
    at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:466)
    at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:264)
    at org.jbpm.pvm.internal.util.ReflectUtil.instantiateUserCode(ReflectUtil.java:414)
    at org.jbpm.pvm.internal.wire.usercode.UserCodeReference.getObject(UserCodeReference.java:63)
    at org.jbpm.pvm.internal.wire.usercode.UserCodeReference.getObject(UserCodeReference.java:47)
    at org.jbpm.jpdl.internal.activity.JavaActivity.perform(JavaActivity.java:58)
    at org.jbpm.jpdl.internal.activity.JpdlAutomaticActivity.execute(JpdlAutomaticActivity.java:15)

This is usually because the Java version the byte code was compiled with is different than what is being used to run it with. I know this, but cannot understand how it can be the case, as I've described above, the Java versions are made sure to be the same. Or at least, that's what I claim..

Any clues where I might have gone off the path would be appreciated..

Thanks,
karoy

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