RS03928: LONG RUNNING RETE EXECUTION WITH DECISION ENGINE MAY THROW OUTOFMEMORY EXCEPTION

APAR status

• Closed as program error.

Error description

• When using RETE intensively with XML binding the execution may
  throw an out of memory exception before completing.
  
  If a javacore is generated the following trace is found
  
  
  at  com/ibm/rules/engine/runtime/debug/AbstractDebugNotifier.
  pushLocation(AbstractDebugNotifier.java:65(CompiledCode))
  at com/ibm/rules/engine/runtime/debug/AbstractDebugNotifier.set
  LocationIndex(AbstractDebugNotifier.java:229(CompiledCode))
  at com/ibm/rules/engine/rete/runtime/AbstractReteEngine.setLoca
  tionIndex(AbstractReteEngine.java:723(CompiledCode))
  

Local fix

• refactor the rules to prevent the execution from running for too
  late. Remove update engine whenever possible, for example when
  the object modified is not part of the condition of the rules
  update is not required.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users executing with RETE with XML binding.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When using RETE intensively with XML binding the execution   *
  * may                                                          *
  * throw an out of memory exception before completing.          *
  *                                                              *
  * If a javacore is generated the following trace is found      *
  *                                                              *
  *                                                              *
  * at                                                           *
  * com/ibm/rules/engine/runtime/debug/AbstractDebugNotifier.    *
  * pushLocation(AbstractDebugNotifier.java:65(CompiledCode))    *
  * at                                                           *
  * com/ibm/rules/engine/runtime/debug/AbstractDebugNotifier.set *
  * LocationIndex(AbstractDebugNotifier.java:229(CompiledCode))  *
  * at                                                           *
  * com/ibm/rules/engine/rete/runtime/AbstractReteEngine.setLoca *
  * tionIndex(AbstractReteEngine.java:723(CompiledCode))         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Memory consumption has been improved.
  

Temporary fix

• refactor the rules to prevent the execution from running for too
  late. Remove update engine whenever possible, for example when
  the object modified is not part of the condition of the rules
  update is not required.
  

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

  WDS FOR RULES

• Fixed component ID

  5725B6903

Applicable component levels