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

bpm.8570.cf2016.06.delta.repository.2of2
bpm.8570.cf2016.06.delta.repository.1of2

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 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