PM05974: CWSIC8007E EXCEPTIONS OCCUR IN A BUS WITH MULTIPLE MESSAGING ENGINES, WHEN DESTINATIONS ARE DYNAMICALLY DELETED AND RECREATED

6.1.0.31: Java SDK 1.5 SR11 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.33: Java SDK 1.5 SR12 FP1 Cumulative Fix for WebSphere
6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• The problem occurred in an IBM WebSphere Process Server
  environment, with multiple messaging clusters, and no
  targeting information specified on the activation
  specifications and connection factories.
  
  When applications were redeployed, the WebSphere Process
  Server deployment scripts deleted Service Integration Bus
  destinations, and created new ones with the same name.
  
  The following exception was thrown to applications after the
  dynamic redeployment was complete:
  CWSIC8007E: An exception was caught from the remote server with
  Probe Id 3-010-0003. Exception: CWSIP0471E: Unable to
  communicate with the messaging engine  DESTINATION_HOSTING_ME
  where the destination DESTINATION_NAME is Localised.
  
  These applications were found to be connecting to an
  intermediate messaging engine, rather than the one where the
  destination is hosted. This was due to the environment
  containing multiple messaging clusters, and not having
  targeting information specified.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of the default messaging provider for *
  *                  IBM WebSphere Application Server Version 6.1*
  *                  with a Service Integration Bus containing   *
  *                  multiple members                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: A CWSIC8007E exception or a buildup     *
  *                      of messages on a remote queue might be  *
  *                      observed after deleting and             *
  *                      recreating a queue                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The problem only occurs in an environment with multiple bus
  members, where applications have not been configured to
  connect to the messaging engine that hosts the destinations
  that they consume from.
  
  A CWSIC8007E exception or buildup of messages might be observed
  on a remote queue point, when a destination has been deleted
  and recreated in one administrative action. For example,
  performing both these actions before pressing 'save' on the
  admin console.
  
  The problem is caused because an intermediate messaging engine
  erroneously updates the properties of the old remote queue
  point, instead of deleting the old remote queue point and
  creating a new one.
  When applications attempt to consume messages from the
  destination, via this intermediate messaging engine, the
  CWSIC8007E error occurs because the old destination is no
  longer available on the messaging engine that owns it.
  
  The problem can be observed by checking the UUID of the remote
  queue point on the intermediate messaging engine, against that
  of the actual UUID of the queue point on the messaging engine
  which hosts the destination. If the UUIDs do not match, then
  it is likely that this APAR has been encountered.
  

Problem conclusion

• The fix for this APAR ensures that destinations are looked
  up by UUID rather than name when the intermediate messaging
  engine receives a dynamic configuration update, allowing it to
  correctly detect that the old destination has been deleted and
  a new destination (which happens to have the same name) has
  been created.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 6.1.0.31.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  PLAT MSG COM

• Fixed component ID

  620600101

Applicable component levels

• R200 PSY

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