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PM06992: STORAGE LEAK CAUSED BY PIPE MGR / DSNXPCRT +0D93 AFTER SOFT CANCEL RC00E50013 ON CHILD TASK WITH PARALLELISM ENABLED

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Sysplex paralelism with remote DB2 case. When paralelism
    structures are built, and when child task is being soft
    cancelled, storage of those structures is not freed, leading to
    storage leak in eg. ECSA.  db2stglk/J
    
    example:
    
    PHB       Subpool name             F/V                 CL SP
    ---       ------------             ---                 -- --
    7DF451D8  PIPE MGR CL12 SUBPOOL    Var        289820K  12 229
    which are occupied by several hundreds/tousends of
    ....PPEL.....5 .   79BE6930 DSNXPCRT +0D93   UK07987
    
    
    MSGDXR175E DXR175E can be seen as well due to ECSA lack
    
    
    Keywords: SQLSTORAGE sqlparallelism sqlsysplexp
    DB2STGLK/K  DB2PARALL/K
    

Local fix

  • disable parallelism
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 for z/OS 8 and DB2 9 for z/OS        *
    *                 SYSPLEX parallelism users.                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: A parallelism storage leak causing an   *
    *                      abend in DSNXPCRT +0D93 may occur when  *
    *                      soft cancels RC00E50013 are issued on   *
    *                      the sysplex parallelism queries.        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A parallelism storage leak causing an abend in DSNXPCRT +0D93
    may occur when soft cancels RC00E50013 are issued on the
    sysplex parallelism queries. It is because after the thread
    cancelling, the parallelism storage is not released properly.
    This could happen on all the sysplex parallelism queries if a
    soft cancel is issued, therefore, the symptom is not query
    related.
    

Problem conclusion

  • DB2 is modified to release the parallelism storage properly
    after a soft cancel is issued for sysplex parallelism query.
    
    Additional Keywords: SQLSTORAGE PARALLELISM SQLPARALLELISM
                         SYSPLEX SQLSYSPLEXP
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    PM06992

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    810

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-02-08

  • Closed date

    2010-04-15

  • Last modified date

    2011-04-27

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

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

    UK56122 UK56123

Modules/Macros

  • DSNXRTSC
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • R810 PSY UK56122

       UP10/05/04 P F005

  • R910 PSY UK56123

       UP10/05/04 P F005

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
27 April 2011