PM73091: SLOW MEMORY LEAK WITH WLM OBJECT WHEN USING JAX-RPC WEB SERVICES

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When you are using a JAX-RPC web services application, you will
    see memory usage grow with WorkLoad Management (WLM) related
    classes such as RuleEtiquette. But the increasing instances of
    the WLM classes were created and allocated by Web Services
    engine code WSChannelManager.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All IBM WebSphere Application Server users  *
    *                  of JAX-RPC Web Services applications        *
    ****************************************************************
    * PROBLEM DESCRIPTION: When you are using a JAX-RPC web        *
    *                      services application in a cluster       *
    *                      environment, you may see memory usage   *
    *                      grow with Work Load Management          *
    *                      related classes such as RuleEtiquette.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In a cluster environment, some Work Load Management classes
    are created and allocated by the Web Services engine through
    Java reflection. And in some rare circumstances, garbage
    collection does not work normally with objects created by
    reflection.
    

Problem conclusion

  • To avoid the memory growth issue caused by reflection, we
    replaced reflection API calls with a regular instantiation of
    the Work Load Management classes in the Web Service engine.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 6.1.0.47, 7.0.0.27, 8.0.0.6 and 8.5.0.2.  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

    PM73091

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    61I

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-09-17

  • Closed date

    2013-01-11

  • Last modified date

    2013-01-11

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

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

    PM73293

Fix information

  • Fixed component name

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R61A PSY

       UP

  • R61H PSY

       UP

  • R61I PSY

       UP

  • R61P PSY

       UP

  • R61S PSY

       UP

  • R61W PSY

       UP

  • R61Z PSY

       UP

  • R700 PSY

       UP

  • R800 PSY

       UP

  • R850 PSY

       UP



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Document information


More support for:

WebSphere Application Server
General

Software version:

6.1

Reference #:

PM73091

Modified date:

2013-01-11

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