PH15161: WHEN XA CLIENTS USING SVRCONN CHANNEL WITH CSQSERVICE1 ATTEMPT MQGET AGAINST SHARED QUEUE, A STORAGE LEAK OCCURS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When XA clients are using a SVRCONN channel with the
  CSQSERVICE1 keyword and the client attempts MQGET against a
  shared queue with commited or uncommitted messages, a storage
  leak can be seen.   ETRQS storage leak.
  SubPool 229 Key 7 SP229 KEY7  ETRQ  CFM Thread Stg
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Messages CSQY221I and CSQY222E may be   *
  *                      seen when performing XA work against    *
  *                      shared queues, with CSQSERVICE1 being   *
  *                      set on the SVRCONN channel the XA       *
  *                      client is using.                        *
  ****************************************************************
  When CSQSERVICE1 is set for a SVRCONN and XA work is being
  performed across the channel to a shared queue, eTRQS control
  blocks may be leaked. These control blocks should be cleaned up
  after a commit or backout. However, if an MQGET does not result
  in a message being retrieved, the control block may be leaked.
  If this scenario is repeated, message CSQY221I and CSQY222E may
  be output.
  

Problem conclusion

• Processing has been updated for clients using CSQSERVICE1 to
  prevent the eTRQS being leaked in this case.
  

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:

  UI65487

Modules/Macros

• CSQEDALL
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI65487

     UP19/10/29 P F910

Fix is available

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