[jboss-user] [jBPM] - NPE caused by Bitronix transaction glitch or drools transaction issue?

[Jing Zhang]

Jing Zhang [http://community.jboss.org/people/zhangjing2000] created the discussion

"NPE caused by Bitronix transaction glitch or drools transaction issue?"

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I wrote a simple java code to test jBPM5.1's JPAKnowledgeService.  I used Bitronix as transaction manager and H2 as database. 
The test java code could start a process, completed a work item and then ended the process successfully, but when I added a method call
WorkflowProcessInstance.getNodeInstances().iterator().next().getNodeName() after starting the process instance, a NPE was caught. 
I found it is due to ProcessInstanceImpl.kruntime is null. After traced the startProcess's execution path, found ProcessInstanceImpl.kruntime has been reset to null after transaction committed in method org.drools.persistence.SingleSessionCommandService.execute(Command<T> command).

Not sure if this is a Bitronix transaction issue or a jBPM5.1 transaction issue.
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