PH62018: ABN=5C6-00C92200 CSQIMPU2 24/07/23 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When the application has previously browsed a message with
  MQGMO_LOCK, and then a subsequent browse fails with reason code
  MQRC_TRUNCATED_MSG_FAILED (2080). In these circumstances, MQ
  fails to track that the current (unchanged) browse cursor has a
  lock associated with it. When a successful browse moves the
  cursor on to another message, the lock associated with the
  previous location is not freed.
  
  If the page is later reused for a put to a queue on the same
  pageset, the retained lock is unexpected and the put request
  abends 5C6-00C92200.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: An 5C6-00C92200 abend occurs during an  *
  *                      MQPUT to a private queue after an       *
  *                      application using the same page set has *
  *                      processed a series of MQGET calls that  *
  *                      utilise MQGMO_LOCK. One of the MQGET    *
  *                      calls must have returned an             *
  *                      MQCC_WARNING with reason code           *
  *                      MQRC_TRUNCATED_MSG_FAILED.              *
  ****************************************************************
  After applying UI93590, an application that issues an MQPUT to a
  private queue after a series of MQGET calls that utilise
  MQGMO_LOCK may abend with 5C6-00C92200.
  
  This is caused by a lock that has leaked after a message has
  been browsed with MQGMO_LOCK and a subsequent MQGET returns
  MQCC_WARNING with reason code MQRC_TRUNCATED_MSG_FAILED (2080).
  
  A subsequent MQPUT on the reused page causes an 5C6-00C92200
  abend as the leaked lock is not expected.
  

Problem conclusion

• The code has been corrected to correctly track the browse locks
  so that they are freed at the correct time.
  

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:

  UI99921

Modules/Macros

• CSQIMGE1 CSQIMGES CSQMGET
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UI99921

     UP25/02/18 P F502 {

Fix is available

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