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PI53566: ON DEMAND ROUTER MEMORY LEAK WHEN UPGRADING APPLICATIONS UNDER LOAD

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The On Demand Router (ODR) has a memory leak related to
    HttpRouteAction objects such that when the system is under load
    and there are configuration changes such as uninstalling and
    installing applications it is possible that multiple, redundant
    HttpRouteAction objects can be created with registered
    listeners for ODC tree changes but never removed.  This will
    eventually fill up the available heap space and cause an Out Of
    Memory issue on the ODR.  Restarting the ODR will correct the
    problem.
    

Local fix

  • Restart the ODR.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Intelligent Management using the     *
    *                  java On Demand Router (ODR).                *
    ****************************************************************
    * PROBLEM DESCRIPTION: An Out Of Memory error can be seen on   *
    *                      the On Demand Router because            *
    *                      HttpRouteAction objects can             *
    *                      accumulate.                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    There is a code bug where HttpRouteAction objects can
    accumulate because they are not freed. This is particularly
    noticeable when there are routing rules present, many
    applications installed, and multiple configuration changes
    happening on the system (such as installing or removing
    applications). Over time this can cause exhaustion of the
    available heap and an Out Of Memory error for the On Demand
    Router.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI53566

  • Reported component name

    WEBSPHERE APP S

  • Reported component ID

    5724J0800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-12-04

  • Closed date

    2016-01-22

  • Last modified date

    2016-03-23

  • 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

    WEBSPHERE APP S

  • Fixed component ID

    5724J0800

Applicable component levels

  • R700 PSY

       UP

  • R850 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 850

Reference #: PI53566

Modified date: 23 March 2016