IT10468: RESEQUENCE NODE CAN RESULT IN HIGH CPU USAGE IF RESTORING OF EVENT FAIL

APAR status

• Closed as program error.

Error description

• Message flow with Resequence node restore saved event messages
  from SYSTEM.BROKER.EDA.EVENTS queue. If this queue contains a
  corrupted event message then the restore fails and the node gets
  into an infinite loop instead of reporting the error. This loop
  leads to high CPU usage and the Execution Group will stop
  responding to mqsi commands.
  

Local fix

• Remove the corrupted message from SYSTEM.BROKER.EDA.EVENTS queue
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of WebSphere Message Broker V8.0 and IBM Integration
  Bus V9.0 and V10.0 using the Resequence node.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Message flow with Resequence node restore saved event messages
  from SYSTEM.BROKER.EDA.EVENTS queue. If this queue contains a
  corrupted event message then the restore fails and the node gets
  into an infinite loop instead of reporting the error. This
  infinite loop leads to high CPU usage and the Execution Group
  will stop responding to mqsi commands.
  
  
  There are a number of resource name changes between WebSphere
  Message Broker and IBM Integration Bus Version 9.0. For details
  visit
  http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.e
  tools.mft.doc/bb23814_.htm
  

Problem conclusion

• The product now throws a BIP2111E error if the restore of saved
  event messages fail, and does not result in an infinite loop.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.7
  v9.0       9.0.0.6
  v10.0      10.0.0.3
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  INTEGRATION BUS

• Fixed component ID

  5724J0530

Applicable component levels

• R900 PSY

     UP