IT19247: MQCONNECTOR CAUSING AN INFINITE LOOP BETWEEN IIB AND MQ FOR MQ RETURN CODES

APAR status

• Closed as program error.

Error description

• When MQ returns a failure return code, the error is logged and
  control is passed back to MQ. This results in a loop where MQ
  continually returns a failure, filling the error logs of both
  applications.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus using the MQGet node.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When using the MQGet node, some return codes from MQ can result
  in an infinite loop where control is continually passed between
  IIB and MQ without any changes occurring to the operation to
  cause the loop to progress/end.
  
  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

• When a message is received on the  MQ connector, previously if
  no message was available, control would be passed back to MQ
  immediately. This has been removed to allow all return code
  checking to take place inside the callback.
  In the callback, if a message MQRC is not MQCC_OK or
  MQCC_WARNING, the callback process is always ended, preventing
  control being passed back to MQ without the problem being fixed.
  This was causing the infinite loop as MQ would repeatedly send
  an error to the broker, and no changes would be made before
  control was passed back, meaning the same error would be sent
  again etc.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.9
  
  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

  5724J0540

Applicable component levels

• RA00 PSY

     UP