PM52124: OutOfMemoryError errors on eXtreme Scale clients can cause the grid to fail.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Following an OutofMemory error on a client, a WXS servers
    threads can become hung under certain circumstances.   When
    this happens the OutOfMemoryError puts the client JVM into a
    state where Reader threads cannot be allocated, or don't
    return.   The WXS server will then get hung with all WXS or
    OGORB threads hung behind one thread dong a socketWrite().
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of WebSphere eXtreme Scale        *
    *                  Version 7.1.1.0.                            *
    ****************************************************************
    * PROBLEM DESCRIPTION: OutOfMemoryError errors on eXtreme      *
    *                      Scale clients can cause the grid to     *
    *                      fail.                                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    There is a window of time where a thread on the eXtreme Scale
    server can get stuck in a socketWrite() method,
    waiting for work to complete on the client that will never be
    done.
    

Problem conclusion

  • An ORB property, com.ibm.CORBA.SocketWriteTimeout, can
    be used to specify the maximum number of seconds a
    socketWrite() method would remain before timing out.
    Typically, set this value to the same value as the
    requestTimeout value.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM52124

  • Reported component name

    XD EXTREME SCAL

  • Reported component ID

    5724J3402

  • Reported release

    711

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-11-11

  • Closed date

    2011-11-18

  • Last modified date

    2011-11-18

  • 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

    WS EXTREME SCAL

  • Fixed component ID

    5724X6702

Applicable component levels

  • R711 PSY

       UP



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Document information


More support for:

WebSphere eXtreme Scale

Software version:

711

Reference #:

PM52124

Modified date:

2011-11-18

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