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PI92940: Avoid sudden high CPU usage and threads hung on busy servers.

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APAR status

  • Closed as program error.

Error description

  • Sudden high CPU usage was observed on servers that
    process large number of requests.
    
    Java dump analysis showed multiple threads were
    writing to non thread-safe WeakHashMap.
    
    Java callstack:
    
    at
    java/util/WeakHashMap.put(WeakHashMap.java:585(Compiled Code))
    at
    org/apache/axis2/jaxws/description/builder/DescriptionBuilderCom
    posite.setSparseComposite(DescriptionBuilderComposite.java:176(C
    ompiled Code))
    at
    org/apache/axis2/jaxws/description/impl/DescriptionFactoryImpl.c
    reateServiceDescription(DescriptionFactoryImpl.java:167(Compiled
     Code))
    at
    org/apache/axis2/jaxws/description/DescriptionFactory.createServ
    iceDescription(DescriptionFactory.java:99(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/ServiceDelegate.<init>(ServiceDelegat
    e.java:216(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/Provider.createServiceDelegate(Provid
    er.java:83(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/Provider.createServiceDelegate(Provid
    er.java: 79(Compiled Code))
    at
    javax/xml/ws/Service.<init>(Service.java:92(Compiled Code))
    ... ...
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server for JAX-WS Web services.             *
    ****************************************************************
    * PROBLEM DESCRIPTION: Avoid sudden high CPU usage and         *
    *                      threads hung on busy servers.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Sudden high CPU usage was observed on servers that process
    large number of requests.
    Java dump analysis showed multiple threads were writing to non
    thread-safe WeakHashMap.
    Java callstack:
    at
    java/util/WeakHashMap.put(WeakHashMap.java:585(Compiled Code))
    at
    org/apache/axis2/jaxws/description/builder/DescriptionBuilderCom
    posite.setSparseComposite(DescriptionBuilderComposite.java:176(C
    ompiled Code))
    at
    org/apache/axis2/jaxws/description/impl/DescriptionFactoryImpl.c
    reateServiceDescription(DescriptionFactoryImpl.java:167(Compiled
    Code))
    at
    org/apache/axis2/jaxws/description/DescriptionFactory.createServ
    iceDescription(DescriptionFactory.java:99(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/ServiceDelegate.<init>(ServiceDelegat
    e.java:216(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/Provider.createServiceDelegate(Provid
    er.java:83(Compiled Code))
    at
    org/apache/axis2/jaxws/spi/Provider.createServiceDelegate(Provid
    er.java: 79(Compiled Code))
    at
    javax/xml/ws/Service.<init>(Service.java:92(Compiled Code))
    ... ...
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI92940

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-01-25

  • Closed date

    2018-06-08

  • Last modified date

    2018-06-08

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R850 PSY

       UP

  • R900 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 850

Reference #: PI92940

Modified date: 08 June 2018


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