[jboss-user] [jBPM] - Any WorkflowProcessInstanceUpgrader working example

[tmag]

tmag [https://community.jboss.org/people/tmag] created the discussion

"Any WorkflowProcessInstanceUpgrader working example"

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Anyone have a working example on WorkflowProcessInstanceUpgrader ? 

As per jBPM 5.3 documentation - when we tried +upgradeProcessInstance()  -+ 
+
+
* +     without a user transaction - its giving NullPointerException+

*Exception in thread "main" java.lang.NullPointerException*
*    at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:68)*
*    at org.jbpm.workflow.instance.WorkflowProcessInstanceUpgrader.upgradeProcessInstance(WorkflowProcessInstanceUpgrader.java:57)*

*      Within a user transaction - its giving ClassCastException
 *java.lang.ClassCastException: org.drools.command.impl.CommandBasedStatefulKnowledgeSession cannot be cast to org.drools.common.InternalKnowledgeRuntime*
*    at org.jbpm.workflow.instance.WorkflowProcessInstanceUpgrader.upgradeProcessInstance(WorkflowProcessInstanceUpgrader.java:61)*
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