IBM Support

JR55844: YOU RECEIVE A CONCURRENTMODIFICATIONEXCEPTION AND NOTICE ONE OF THE ACTIONS ROLLS BACK

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APAR status

  • Closed as program error.

Error description

  • When parallel flows (such as generalized flows, event handlers,
    or for-each blocks) run in a BPEL process, different threads
    might try to access the same Java objects at the same time,
    causing a ConcurrentModificationException:
    
    java.util.ConcurrentModificationException
     at java.util.ArrayList$Itr.checkForComodification
      (ArrayList.java:871)
     at java.util.ArrayList$Itr.next(ArrayList.java:843)
     at com.ibm.bpe.database.SharedWorkItemCache.get
      (SharedWorkItemCache.java:430)
     at com.ibm.bpe.database.
      SharedWorkItemManager$SharedWorkItemPatternCache.
      get(SharedWorkItemManager.java:2173)
     at com.ibm.bpe.database.SharedWorkItemManager.
      assignExistingSharedWorkItemID
      (SharedWorkItemManager.java:866)
     at com.ibm.bpe.database.SharedWorkItemManager.
      assignSharedWorkItemID(SharedWorkItemManager.java:774)
     at com.ibm.bpe.database.SharedWorkItemManager.
      transform(SharedWorkItemManager.java:731)
     at com.ibm.bpe.database.SharedWorkItemManager.
      transform(SharedWorkItemManager.java:699)
     at com.ibm.bpe.database.SharedWorkItemManager.
      beforeCompletion(SharedWorkItemManager.java:204)
     at com.ibm.bpe.database.TomExtended.beforeCompletion
      (TomExtended.java:1109)
     at com.ibm.bpe.database.TomExtended.flush(TomExtended.
      java:1078)
     at com.ibm.bpe.framework.BusinessProcessServiceImpl.
      completeTransaction(BusinessProcessServiceImpl.java:39186)
     at com.ibm.bpe.framework.BusinessProcessServiceImpl.
      getProcessInstance(BusinessProcessServiceImpl.java:22738)
     at com.ibm.bpe.framework.BusinessFlowManagerBean.
      getProcessInstance(BusinessFlowManagerBean.java:14328)
    
    As a result, one of the actions rolls back.
    

Local fix

Problem summary

  • Because of a thread safety issue, which enables concurrent
    access to a Java object by several threads, a
    ConcurrentModificationException is thrown during BPEL processing
    and the thread that receives the exception rolls back.
    

Problem conclusion

  • A fix will be included in IBM BPM V8.5.7 cumulative fix 2016.06
    
    To determine whether the cumulative fix is available and
    download it if it is, complete the following steps on Fix
    Central:
    
    1. Select IBM Business Process Manager with your edition from
      the product selector, the installed version to the fix pack
      level, and your platform, and then click Continue.
    
    2. Select Text, enter "cumulative fix?, and click Continue.
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR55844

  • Reported component name

    BPM ADVANCED

  • Reported component ID

    5725C9400

  • Reported release

    857

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-05-02

  • Closed date

    2016-05-25

  • Last modified date

    2016-05-25

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    BPM ADVANCED

  • Fixed component ID

    5725C9400

Applicable component levels

  • R857 PSY

       UP

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Document Information

Modified date:
25 May 2016