PH46154: BLOCKED THREAS IN COM/IBM/WS/BO/BOEXTENDEDMETADATA.CONTAINSPACKAGE UNDER HEAVY LOAD

APAR status

• Closed as program error.

Error description

• If a user application is programmed to create a lot of
  DataObjects, this will have a significant performance impact and
  may result in hung threads.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM Business Automation        *
  *                  Workflow which uses Eclipse Modeling        *
  *                  Framework (EMF) included in WebSphere       *
  *                  Application Server                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Slow performance noticed in Eclipse     *
  *                      Modeling Framework (EMF) included in    *
  *                      WebSphere Application Server.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The EPackageRegistry component of EMF has synchronization
  which makes usage by multiple threads mutually exclusive.  This
  blocking of other threads causes a performance problem in IBM
  Business Automation Workflow.
  The reason for the synchronization is that packages may be
  added or removed from the registry while the package registry
  is being accessed.
  

Problem conclusion

• A new API is added to the EMF library included in
  WebSphere Application Server which can be used to indicate
  that no further updates will be made to the package registry.
  When this API is called, EMF will stop using synchronization
  in the EPackageRegistry.
  
  Business Automation Workflow APAR JR64790 adds usage of this
  new API which removes the performance problem.
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.23 and 9.0.5.13. For more information, see 'Recommended
  Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels