JR43825: CWWBE0057I CONCURRENTMODIFICATIONEXCEPTION WHEN XPATH RESOLUTION CACHE FULL; possibly ArrayIndexOutOfBoundsException or other

Version 8.0 Refresh Pack 1 for the IBM Business Process Manager products
Version 7.5.1 Fix Pack 1 for the IBM Business Process Manager products

APAR status

• Closed as program error.

Error description

• Exceptions during long running process when multiple process
  instances run at the same time;
  ConcurrentModificationException, ArrayOutOfBoundsException,
  NullPointerException, DataXPathEvaluationFailedException and
  MessagePartQueryFailedException during long running process when
  multiple process instances run at the same time.
  
  The affected process instances remain in the state
  STATE_RUNNING, the affected activity instance of the process
  instance is in the state STATE_STOPPED. The exceptions occur
  apparently randomly in different assign activities,
  forEach-Expression and Java-Snippets.
  
  What happens is that during an Assign activity in BPEL the xpath
  resolution cache is full, a ConcurrentModificationException is
  thrown and the Business Process stops working. The instance
  remains in stopped state.
  .
     The error that is most likely to be seen is
  [4/15/1419:14:19:578 CEST] 00000201 ProcessEngine I
  CWWBE0057I: Activity 'Switch_2' of processes
  '1020146029281_DOCUMENTACTION_75aaa634-6685-4510-88e3-
  17dc76d4f27f' has been stopped because of an unhandled failure.
    com.ibm.bpe.api.RuntimeFaultException: CWWBE0089E: An
  error occurred during the evaluation of a condition associated
  with activity 'Switch_2'.
         java.util.ConcurrentModificationException: null
  .
  .----------------------------------------
     Here are examples of some of the other errors that may occur
  19.07.12 15:06:22:221 CEST] 000000da ProcessEngine I
  CWWBE0057I: The activity 'Assign40' of the proces
  'RequestEditProcess:1342703104358' was stopped due to an
  unhandled exception.
   com.ibm.bpe.api.StandardFaultException: CWWBE0085E:
  When assigning the variable or partner connection 'multiple
  information' in action 'Assign40' incompatible types were found.
          java.util.ConcurrentModificationException: null
  
  19.07.12 15:10:59:343 CEST] 00000081 ProcessEngine I
  CWWBE0057I: The activity 'Assign42' of the proces
  'RequestEditProcess:1342703104358' was stopped due to an
  unhandled exception.
    com.ibm.bpe.api.StandardFaultException: CWWBE0085E:
  When assigning the variable or partner connection 'multiple
  information' in action 'Assign40' incompatible types were found.
           java.lang.ArrayIndexOutOfBoundsException: null
  
  19.07.12 15:16:54:703 CEST] 00000112 ProcessEngine I
  CWWBE0057I: The activity 'Invoke4' of the proces
  'RequestEditProcess:1342703104358' was stopped due to an
  unhandled exception.
    com.ibm.bpe.api.RuntimeFaultException: CWWBE0152E:
  An error occurred when the activity 'Invoke4' in process 'Edit
  application process' processed their correlation sets.
     com.ibm.bpe.api.MessagePartQueryFailedException:
  CWWBA0135E:
  The query expression 'process id' in the message part
  'parameters' can not be evaluated.
  

Local fix

• Currently no local fix or workaround yet.
  

Problem summary

• Problem Description:
  When during execution or evaluation of an XPath expression in a
  Business Process the XPath resolution
  cache is full, a ConcurrentModificationException is thrown and
  the Business Process' fault handling is started, e.g.
  the related activity instance stops.
  
  Problem Summary:
  The XPath intermediate result cache is not sufficiently
  synchronized.
  
  Problem Conclusion:
  The XPath intermediate result cache put and get methods are now
  synchronized.
  

Problem conclusion

• Problem fixed
  iFix available on top of V751 GA
  

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:

  JR43870 JR43871

Fix information

• Fixed component name

  BPM ADVANCED

• Fixed component ID

  5725C9400

Applicable component levels

• R751 PSY

     UP