PH69863: CSQY221I AND CSQY222E CSQSCTL QUEUE MANAGER IS CRITICALLY SHORT OF LOCAL STORAGE - TAKE ACTION

APAR status

• Closed as program error.

Error description

• The following messages are seen in MSTR job log: CSQY221I cpf
  CSQSCTL Queue manager is short of local storage CSQY222E cpf
  CSQSCTL Queue manager is critically short of local storage -
  take action
  
  The messages CSQY220I issued over the time show a gradual
  reduction of free area in local storage.
  
  The memory leak is of eTROP control blocks from the 'CFM Thread
  Ops' storage pool. The eTROP blocks being leaked represent
  browse locked messages from shared queues.
  
  The memory leak is a result of a bug when an expired message on
  a shared queue is browsed with MQGMO_LOCK. Each time this
  happens, a 120 byte CSQE_Browse_Locked_Designation eTROP is
  leaked.
  

Local fix

• There is no circumvention for this problem, except avoiding the
  described application pattern.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0 and Release 4       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: A leak of eTROP control blocks led to   *
  *                      local storage being exhausted in the    *
  *                      Queue Manager Address space and message *
  *                      CSQY221I is output in the Queue Manger  *
  *                      job logs.                               *
  ****************************************************************
  The memory leak of eTROP control blocks occurs when an attempt
  to browse lock an expired message on a shared queue with the
  MQGMO option MQGMO_LOCK. In this scenario an eTrop of size 120
  bytes is leaked.
  

Problem conclusion

• The code has been corrected to correctly free the eTROP that is
  created when attempting to browse lock an expired message on a
  shared queue.
  

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:

  PH72507 UO09315 UO09316

Modules/Macros

• CSQEMEXP
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels