[jboss-jira] [JBoss JIRA] Created: (BPEL-260) Flow activity might not reactivate parent token in race condition

[Alejandro Guizar (JIRA)]

Flow activity might not reactivate parent token in race condition
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                 Key: BPEL-260
                 URL: http://jira.jboss.com/jira/browse/BPEL-260
             Project: JBoss jBPM BPEL
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Engine
    Affects Versions: jBPM BPEL 1.1 beta 3
            Reporter: Alejandro Guizar
         Assigned To: Alejandro Guizar
            Priority: Critical
             Fix For: jBPM BPEL 1.1 GA


The flow activity suffers from the same problem as the join node in jPDL. When child tokens performing each nested activity finish concurrently, it is possible that all of them determine that the parent token must not be reactivated yet, leading to deadlock. The cause of this behavior is transaction isolation.

To prevent this problem, the code to leave the flow must acquire exclusive access to the state of the concurrent tokens.

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