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PM31557: HUNG THREAD AND NULLPOINTEREXCEPTIONS ON ESIPROCESSOR.LISTEN

Fixes are available

7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

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APAR status

  • Closed as program error.

Error description

  • The javacores show there are many webcontainer threads held up
    by the ESIProcessor.
    
    Javacore show the following stack code
    ----------------------------------------------------
    at java/lang/Object.wait(Native Method)
    at java/lang/Object.wait(Object.java:199(Compiled Code))
    at
    com/ibm/ws/cache/servlet/ESIProcessor.listen(ESIProcessor.java:3
    36)
    at
    com/ibm/ws/cache/servlet/ESIProcessor.run(ESIProcessor.java:49)
    at
    com/ibm/websphere/servlet/cache/ESIInvalidatorServlet.doPost(ESI
    Invalida
    torServlet.java:48)
    at javax/servlet/http/HttpServlet.service(HttpServlet.java:763)
    at javax/servlet/http/HttpServlet.service(HttpServlet.java:856)
    at
    com/ibm/ws/cache/servlet/ServletWrapper.serviceProxied(ServletWr
    apper.ja
    va:282)
    ----------------------------------------
    
    Traces Shows the following NullpointerException.
    ------------------------------------------
    
    java.lang.NullPointerException
    at
    com.ibm.ws.cache.servlet.ESIProcessor.markDead(ESIProcessor.java
    :337)
    at
    com.ibm.ws.cache.servlet.ESIProcessor.readInt(ESIProcessor.java:
    448)
    at
    com.ibm.ws.cache.servlet.ESIProcessor.initPID(ESIProcessor.java:
    430)
    at
    com.ibm.ws.cache.servlet.ESIProcessor.initalizeProcessor(ESIProc
    essor.java:317)
    at
    com.ibm.ws.cache.servlet.ESIProcessor.<init>(ESIProcessor.java:2
    90)
    at
    com.ibm.ws.cache.servlet.ESIProcessor.run(ESIProcessor.java:82)
    at
    com.ibm.websphere.servlet.cache.ESIInvalidatorServlet.doPost(ESI
    InvalidatorServlet.java:48)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
    ----------------------------------------------
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V6.1 and V7.0 using Edge Side        *
    *                  Include (ESI) caching.                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: A NullPointerException occurs in        *
    *                      com.ibm.ws.cache.servlet.ESIProcessor   *
    *                      when the application server is started. *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The dynacache service sends periodic requests to the plug-in
    to verify the connection is still up.  If the request fails
    then the thread ends.  Otherwise it continues to wait for
    work.  If the request fails before dynacache has fully
    initialized the ESI processor the NullPointerException may
    occur.
    

Problem conclusion

  • Dynacache will wait until the ESI processor is fully
    initialized prior to sending requests to the plug-in.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 6.1.0.39 and 7.0.0.17.  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

    PM31557

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    61A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-01-31

  • Closed date

    2011-02-10

  • Last modified date

    2011-02-10

  • 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

  • R61A PSY

       UP

  • R61H PSY

       UP

  • R61I PSY

       UP

  • R61P PSY

       UP

  • R61S PSY

       UP

  • R61W PSY

       UP

  • R61Z PSY

       UP

  • R700 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 6.1

Reference #: PM31557

Modified date: 10 February 2011