JR45468: MEMORY LEAK IN CEI ROUTER PLUGIN

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • There is a memory leak in the
    com.ibm.wbimonitor.router.scalable.distribution.MMRoutingClassLo
    ader plugin. This memory leak manifests itself on a server
    (WebSphere Application Server, WebSphere Process Server, or
    Business Process Manager) hosting CEI, where this plugin is
    installed for event routing to IBM Business Monitor.  It can
    result in system crashes due to JVM heap memory exhaustion.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of IBM Business Monitor Version       *
    *                  7.5.1.                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: There is a memory leak in the           *
    *                      com.ibm.wbimonitor.router.scalable.dist *
    *                      ribution.MMRoutingClassLoader plugin.   *
    *                      This memory leak manifests itself on    *
    *                      a server (WebSphere Application         *
    *                      Server, WebSphere Process Server, or    *
    *                      Business Process Manager) hosting       *
    *                      CEI, where this plugin is installed     *
    *                      for event routing to IBM Business       *
    *                      Monitor.  It can result in system       *
    *                      crashes due to JVM heap memory          *
    *                      exhaustion.                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Java class loaders are created and cached by the plugin on a
    per monitor model, per thread basis, causing an excessive
    amount of heap memory to be used.
    

Problem conclusion

  • Changing the caching algorithm to be per monitor model, per
    JVM (using a "weak hash map" keyed on a specific instance of a
    common key) significantly reduces heap memory usage.
    
    An interim fix for IBM Business Monitor Version 7.5.1.0 has
    been published to Fix Central.  Please refer to the separate
    file that is automatically downloaded with the interim fix
    for prerequisite information and installation/uninstallation
    instructions.
    

Temporary fix

Comments

APAR Information

  • APAR number

    JR45468

  • Reported component name

    WEB BUS MONITOR

  • Reported component ID

    5724M2400

  • Reported release

    751

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-01-18

  • Closed date

    2013-04-29

  • Last modified date

    2013-04-29

  • 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

    WEB BUS MONITOR

  • Fixed component ID

    5724M2400

Applicable component levels

  • R750 PSY

       UP



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Document information


More support for:

WebSphere Business Monitor

Software version:

751

Reference #:

JR45468

Modified date:

2013-04-29

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