PH67785: CSQY224I CSQSCTL QUEUE MANAGER IS SHORT OF LOCAL STORAGE ABOVE THE BAR AND CSQY225E CSQSCTL QUEUE MANAGER IS CRITICALLY SHORT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The following messages were seen in MSTR job log (the queue
  manager was started with MEMLIMIT 3GB): CSQY224I cpf CSQSCTL
  Queue manager is short of local storage above the bar CSQY225E
  cpf CSQSCTL Queue manager is critically short of local storage
  above the bar - take action There are many 64 bit MOMB blocks
  pointing to storage with TPFX eyecatchers. The build up of
  storage is due to a storage leak of 64bit storage used to hold
  topic strings (in this particular case, many copies of the same
  topic string). The leak occurs when the storage is allocated
  during open processing for a topic object, if the open
  subsequently fails before registering the publisher - for
  example, due to the security check on the topic failing. In this
  case, although it is not possible to see any instances of the
  open failing, the doc shows that despite many attempts to open
  the topic associated with the topic string seen in the TPFX
  blocks, each of which has allocated a block of storage for the
  topic string, the topic hasn't been successfully opened since
  the queue manager started. This APAR was raised to correct this
  storage leak.
  

Local fix

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: Applications failing to open topics     *
  *                      leak storage above the bar, resulting   *
  *                      in a storage shortage, as reported by   *
  *                      CSQY224I and CSQY225E.                  *
  ****************************************************************
  While opening a topic, storage is allocated to build a copy of
  the associated topic string and linked to the handle. If the
  MQOPEN fails to open the topic, in some scenarios (for example,
  not authorised), this storage is not freed. Over time the amount
  of leaked storage can accumulate, eventually leading to a
  storage shortage above the bar, which is reported by messages:
  
  'CSQY224I xxxx CSQSCTL Queue manager is short of local storage
  above the bar'
  and
  'CSQY225E xxxx CSQSCTL Queue manager is critically short of
  local storage above the bar - take action'
  

Problem conclusion

• MQOPEN processing for topics is changed to free the allocated
  storage when the MQI call is unsuccessful.
  

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:

  UO04976 UO04977

Modules/Macros

• CSQMOPNI
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UO04977

     UP25/11/12 P F511

• R400 PSY UO04976

     UP25/11/12 P F511

Fix is available

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