IC81429: MQGET ON MESSAGE WITH PART OF MESSAGE MISSING FROM QUEUE OVERFLOW FILE DOES NOT RETURN FFST, AND RETURNS 2003 INCORRECTLY

WebSphere MQ for HP NonStop Server V5.3.1 fix pack 5.3.1.9

APAR status

• Closed as program error.

Error description

• Cause.
  Because of a code change made in the WMQv51 product that was
  carried into WMQv53, if a portion of a message that should be in
  the message overflow file is missing, the generation of the FFST
  was suppressed.
  Also, this particular problem results in a MQRC 2003 being
  returned. All subsequent MQGET's on this queue fail, as the
  partial message cannot be removed with normal options.
  
  Fix.
  If a WRITEUPDATEX call on the Queue Overflow file returns an
  error 11, then generate an FFST. Also, set return code to 2101
  (0x0835) (RC2101): MQRC_OBJECT_DAMAGED.
  

Local fix

• The only known workaround is to clear to queue (clear qlocal) in
  RUNMQSC or to manually remove the record from the Queue File
  (eg. using FUP).
  This is extremely rare, and the only known cause is
  the audit flag being set to off on the overflow file
  and then having an MQGET of a persistent message larger than
  3.5k but less than the message overflow threshold for the queue
  backed out by TMF.
  

Problem summary

• Because of a code change made in the WMQv51 product that was
  carried into WMQv53, if a portion of a message that should be in
  the message overflow file is missing, the generation of the FFST
  was suppressed.
  Also, this particular problem results in a MQRC 2003 being
  returned. All subsequent non-specific MQGETs from the queue
  fail, since the partial message cannot be retrieved.
  

Problem conclusion

• If a WRITEUPDATEX call on the Queue Overflow file returns an
  
  error 11, then generate an FFST. Also, set return code to 2101
  

Temporary fix

• clear qlocal on affected queue, or use some manual method to
  remove the corresponding primary record from Queue file
  

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

  WEBS MQ NSS MIP

• Fixed component ID

  5724A3901

Applicable component levels

• R531 PSY

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