PM71269: THE CSQUDLQH INCORRECTLY HANDLES MESSAGES WITH MQMDE USING GROUPMESSAGING 12/08/29 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The customer has a queue that is indexed by groupid, and the
  messages are being put on that queue using grouping. They had an
  instance where the queue filled up and spilled into the dead
  letter queue. The dead letter queue handler CSQUDLQH (IBM
  supplied) put the messages back on the original queue when the
  queue full condition was relieved. However, the messages that
  had been on the dead letter queue had the MQMDE included in the
  application portion of the message rather than the header
  portion. This caused the application to have problems.
  .
  The change team has reproduced the problem and believes there
  is a defect in CSQUDLQH that is not using the correct version of
  MQMD when retrying or forwarding a group message from the DLQ.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ Version 7          *
  *                 Release 0 Modification 1 and                 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Applications putting group messages,    *
  *                      using MQMD version 2 followed by MQMDE  *
  *                      header, create invalid messages in the  *
  *                      destination queue.                      *
  *                      The consumer applications find an       *
  *                      unexpected MQMDE header as part of the  *
  *                      body of the message.                    *
  *                      An example of an application affected   *
  *                      by this problem is utility CSQUDLQH.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  MQPUT calls, using a MQMD version 2 followed by MQMDE for group
  messages, ignore the group information and consider the MQMDE as
  an application header.
  

Problem conclusion

• MQPUT checks if MQMDV2 group fields are not used then it checks
  for the presence of a MQMDE header and if it is valid the MQMDE
  group information is used and group messages can be consumed
  by applications without finding unexpected headers.
  010Y
  100Y
  CSQMPUTV
  CSQUODQL
  

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:

  UK81844 UK81845

Modules/Macros

• CSQMPUTV CSQUODQL
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK81844

     UP12/10/10 P F210 Ø

• R100 PSY UK81845

     UP12/10/10 P F210 Ø

Fix is available

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