IT20272: ROLLBACK OF LARGE SEGMENTED MESSAGE BLOCKS INPUT QUEUE AND REPORTS MQRC 2030/2031.

APAR status

• Closed as program error.

Error description

• The rollback of a large segmented MQ message can result in an
  MQRC of MQRC_MSG_TOO_BIG_FOR_Q (2030) or
  MQRC_MSG_TOO_BIG_FOR_Q_MGR (2031) errors. This will cause the
  segmented messages to remain on the input queue and as such the
  message flow cannot process any further messages.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of IBM Integration Bus v10.0 using MQ input nodes
  sending segmented MQ messages where the total cumulative size of
  the message segments sent exceed the MQ queue or queue manager
  maximum size setting.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When an MQInput node retrieves messages from its input queue it
  specifies the MQGMO_COMPLETE_MSG option. This means that if the
  input queue has segmented messages on it then the queue manager
  will return a single MQ message containing all of the segments.
  When a message flow detects that the input message has exceeded
  its backout count then it will attempt to put the message to
  the input queues Backout queue (if one is defined) or to the
  DLQ (if the queue manager has one).
  
  With all of the message segments now in one message buffer, the
  resultant message can be too large for the queue and/or the
  queue manager. This can result in an MQRC of
  MQRC_MSG_TOO_BIG_FOR_Q (2030) or MQRC_MSG_TOO_BIG_FOR_Q_MGR
  (2031). This will cause the segmented messages to remain on the
  input queue and as such the message flow cannot process any
  further messages.
  

Problem conclusion

• The product has been corrected so that the resultant large
  message is put to the Backout queue or DLQ with
  MQMF_SEGMENTATION_ALLOWED. This means the queue manager will
  split the large message up if it needs to.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.10
  
  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