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PI27324: CF STRUCTURE RECOVERY: CSQY220I CSQY222E STORAGE SHORTAGE IN THE QUEUE MANAGER ADDRESS SPACE.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • CSQY220I CSQSCTL Queue manager storage usage
    CSQY222E CSQSCTL Queue manager is critically short of local
             storage - take action
     Storage shortage in the queue manager address space. When the
    queue manager does a CF structure recovery, it creates a new
    storage pool for processing the logs. When recovery is finished,
    this pool is freed. Due to the storage alignment requirements
    for CF operations, this is a special pool, and some of the
    storage is not freed correctly. Due to the large number of
    recovery attempts, the queue manager leaks a large amount of
    storage (around 700MB) and uses up most of the available
    storage below the bar.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: The storage usage in the queue manager  *
    *                      increases for each structure recovery   *
    *                      that is processed.                      *
    *                      Eventually the queue manager runs short *
    *                      on storage and issues messages CSQY220I *
    *                      and CSQY222E. S878 abends may also      *
    *                      occur.                                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When the queue manager recovers a CF structure, a storage pool
    is allocated to hold information on the relevant messages that
    are to be restored.
    The storage pool is released again after recovery completes.
    However, given that the storage required for CF operations needs
    to be page aligned, the normal buffer infrastructure is in a
    special case scenario and acquires additional storage.
    This additional storage is not released when the buffer pool is
    freed, causing the leak.
    Each structure recovery leaks at least x7E0000 bytes of storage.
    

Problem conclusion

  • The code has been changed to correctly release all the storage
    associated with a given storage pool.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PI27324

  • Reported component name

    WMQ Z/OS 8

  • Reported component ID

    5655W9700

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-10-09

  • Closed date

    2014-12-17

  • Last modified date

    2015-02-03

  • APAR is sysrouted FROM one or more of the following:

    PI25129

  • APAR is sysrouted TO one or more of the following:

    UI23985

Modules/Macros

  • CSQSFPL
    

Fix information

  • Fixed component name

    WMQ Z/OS 8

  • Fixed component ID

    5655W9700

Applicable component levels

  • R000 PSY UI23985

       UP15/01/29 P F501 ¢

Fix is available

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Document Information

Modified date:
30 April 2020