PM82446: SESSION REBALANCING FAILS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • WVE HTTP session rebalancing is terminated abnormally which
    causes the sessions to not actually be moved.  This causes the
    DWLM controller to send additional session move requests and can
    cause delays in request/response processing.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of WebSphere Virtual Enterprise   *
    *                                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: The HTTP session rebalancing            *
    *                      fails, and causes on demand router      *
    *                      request or response processing delay.   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The on demand routers communicate to ensure that a request is
    routed with affinity to the same server based, on the dynamic
    workload management controller session move messages. During
    each move request communication, the primary on demand router
    waits for a maximum of 2 seconds to get session statistics from
    each of the secondary on demand routers. The on demand router
    waits full 2 seconds if the communication is affected by
    stress in the system. This behavior causes delays in the on
    demand router request processing.
    

Problem conclusion

  • The session move coordination algorithm was fixed to remove the
    2 second delay.
    
    This fix will be included in the next available fix pack for
    WebSphere Virtual Enterprise.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM82446

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-08

  • Closed date

    2013-02-08

  • Last modified date

    2013-02-08

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

    PM73753

  • 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



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Document information


More support for:

WebSphere Application Server
General

Software version:

850

Reference #:

PM82446

Modified date:

2013-02-08

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