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PI37712: OSGI DYNAMIC IMPORT RESOLUTION IS SLOW

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Newly deployed EJB fails initial startup with NPE but then
    starts normally on the second startup.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: The server experiences a period of      *
    *                      extreme slowness, with the relevant     *
    *                      threads performing dynamic OSGI         *
    *                      bundle resolution                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    WebSphere Application Server includes the Equinox OSGi
    framework, which manages relationships between installed
    "bundles" on the server. In some cases, bundles attempt to
    dynamically import packages from other bundles, and the
    resolution process is inefficient, causing threads to move
    very slowly (presenting to the user as either slow performance
    or hangs).  If thread stacks are inspected, the top of the
    relevant thread(s) will include method calls with the string
    "Dynamic" - in particular,
    org/eclipse/osgi/internal/module/ResolverImpl.resolveDynamicImpo
    rt.
    

Problem conclusion

  • Eclipse bug 337371, which improves the efficiency of dynamic
    bundle resolution, was integrated into the Equinox framework
    packaged in WebSphere Application Server.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 8.5.5.7.  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

    PI37712

  • 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

    2015-03-24

  • Closed date

    2015-06-23

  • Last modified date

    2015-06-23

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R850 PSY

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 April 2022