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PI80650: MEMORY LEAK IN SP132 KEY8 CAUSES OUTOFMEMORY IN LIBERTY

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APAR status

  • Closed as program error.

Error description

  • Unauthorized code in bbgzsufm is using thread level heap
    caches
    which are not cleaned up when a thread ends. This is causing
    a
    memory leak in SP132 Key8 leading to an OutofMemory
    condition in
    private storage. Javacore shows:
    Dump Event "systhrow" (00040000) Detail
    "java/lang/OutOfMemoryError" "Failed to create a thread:
    retVal
    -1073741830, errno 112 (0x70), errno2 189858450 (0xb510292)"
    received
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty for z/OS                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: Memory leak in Subpool 132 Key 8        *
    *                      storage                                 *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Some Liberty features, such as zosRequestLogging-1.0, take
    advantage of z/OS callable services that can be invoked by
    problem state programs.  In some cases memory used by a task
    that uses these features is not freed when the task ends.  In
    environments where tasks are created and end frequently, this
    can lead to a noticable storage leak in subpool 132 key 8
    storage.  The size of the individual storage cells can vary but
    is usually 0x400 bytes.
    

Problem conclusion

  • Code was added to prevent Liberty from associating subpool 132
    key 8 storage with individual tasks.
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 17.0.0.2.  Please refer to the Recommended Updates page for
    delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI80650

  • Reported component name

    LIBERTY PROF -

  • Reported component ID

    5655W6514

  • Reported release

    CD0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-04-27

  • Closed date

    2017-05-08

  • Last modified date

    2017-05-08

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

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

Fix information

  • Fixed component name

    LIBERTY PROF -

  • Fixed component ID

    5655W6514

Applicable component levels

  • RCD0 PSY

       UP

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M"},"Platform":[{"code":"PF054","label":"z\/OS"}],"Version":"CD0"}]

Document Information

Modified date:
07 September 2021