IBM Support

PK72336: NULLPOINTEREXCEPTION FROM CHANNEL FRAME WORK AFTER PK63328

Fixes are available

7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for IBM i
7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for AIX
7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for HP-UX
7.0.0.1: WebSphere Application Server V7.0 Fix Pack 1 for AIX
7.0.0.3: Java SDK 1.6 SR4 Cumulative Fix for WebSphere Application Server
PK72336; NullPointerException from channel frame work after PK63328
7.0.0.1: WebSphere Application Server V7.0 Fix Pack 1 for Windows
7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for Solaris
7.0.0.1: WebSphere Application Server V7.0 Fix Pack 1 for HP-UX
7.0.0.1: WebSphere Application Server V7.0 Fix Pack 1 for Linux
7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for Linux
7.0.0.1: WebSphere Application Server V7.0 Fix Pack 1 for Solaris
Java SDK 1.5 SR8 Cumulative Fix for WebSphere Application Server
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for AIX
7.0.0.3: WebSphere Application Server V7.0 Fix Pack 3 for Windows
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for IBM i
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for Windows
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for HP-UX
7.0.0.5: Java SDK 1.6 SR5 Cumulative Fix for WebSphere Application Server
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for Solaris
7.0.0.5: WebSphere Application Server V7.0 Fix Pack 5 for Linux
Java SDK 1.5 SR10 Cumulative Fix for WebSphere Application Server
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for IBM i
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for AIX
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for Windows
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for HP-UX
7.0.0.7: Java SDK 1.6 SR6 Cumulative Fix for WebSphere Application Server
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for Solaris
7.0.0.7: WebSphere Application Server V7.0 Fix Pack 7 for Linux
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for IBM i
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for Windows
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for AIX
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for HP-UX
7.0.0.9: Java SDK 1.6 SR7 Cumulative Fix for WebSphere Application Server
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for Solaris
7.0.0.9: WebSphere Application Server V7.0 Fix Pack 9 for Linux
6.1.0.31: Java SDK 1.5 SR11 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for IBM i
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for Windows
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for HP-UX
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for AIX
7.0.0.11: Java SDK 1.6 SR7 Cumulative Fix for WebSphere Application Server
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for Solaris
7.0.0.11: WebSphere Application Server V7.0 Fix Pack 11 for Linux
6.1.0.33: Java SDK 1.5 SR12 FP1 Cumulative Fix for WebSphere
6.1.0.29: Java SDK 1.5 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for AIX
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for HP-UX
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for IBM i
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Linux
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Solaris
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Windows
7.0.0.13: Java SDK 1.6 SR8FP1 Cumulative Fix for WebSphere Application Server
6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for AIX
7.0.0.15: Java SDK 1.6 SR9 Cumulative Fix for WebSphere Application Server
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for HP-UX
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for IBM i
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Linux
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Solaris
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Windows
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
7.0.0.17: WebSphere Application Server V7.0 Fix Pack 17
7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
7.0.0.1: Java SDK 1.6 SR3 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
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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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • WebContainer threads become unusable after the following
    exception is logged.
    
    java.lang.NullPointerException
     at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:111)
     at
    com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
     at
    com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHand
    ler.java:743)
     at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
     at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
    
    Few other symptoms customer's would see :
    
    1. When deploying a enterprise application using adminconsole
    after selecting the application from browser button , next
    button at the botton of console disappears.
    
    2. When deploying a enterprise application using adminconsole
    after selecting the application from browser button , when
    clicking on "map modules to servers" , it displays blank page.
    
    3. The adminconsole does not display the parts of "Web services
    client bindings" page for a webservices application.
    

Local fix

  • Note that because the problem only happens when
    finishBufferResponse request is processed asynhronously it is
    possible to prevent the problem by forcing all such requests to
    be handled synchronously. This can be done by setting the
    webcontainer custom property:
    
    com.ibm.ws.webcontainer.channelwritetype=sync
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of WebSphere Application Server       *
    *                  Version 6.1.0.19                            *
    ****************************************************************
    * PROBLEM DESCRIPTION: Various issues including hanging        *
    *                      threads and missing response data       *
    *                      resulting from a forwarded request.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    PK63328 introduced an issue where a http connection can be
    closed too early for a response from a forwarded request.
    Depending on the timing of when the http connection is closed
    several different symptoms have been observed and these include:
    
    - Null pointer exceptions
    - Missing response data
    - Hanging threads
    
    Other symptoms may also be possible.
    
    Note that the problem only occurs when response data is sent
    asynchronously and as a result are more likely to occur under
    load and will not happen when the following WebContainer
    custom property is set:
    
     com.ibm.ws.webcontainer.ChannelWriteType=sync
    
    
    One example of  a NullPointerException exception resulting
    from this problem is:
    
    java.lang.NullPointerException
    at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:11
    at com.ibm.io.async.ResultHandler.complete(ResultHandler.java
    95)
    at com.ibm.io.async.ResultHandler.runEventProcessingLoop(Resu
    Handler.java:743)
    at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:87
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473
    
    Another example of a  NullPointerException exception
    resulting from this problem is:
    
    
    java.lang.NullPointerException
    at com.ibm.ws.tcp.channel.impl.NioSocketIOChannel.
      attemptWriteToSocketUsingNIO(NioSocketIOChannel.java:158)
    at com.ibm.ws.tcp.channel.impl.SocketIOChannel.
      attemptWriteToSocket(SocketIOChannel.java:744)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO
      (WorkQueueManager.java:628)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun
      (WorkQueueManager.java:979)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run
      (WorkQueueManager.java:1064)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1462
    

Problem conclusion

  • The WebContainer has been updated to only close a connection
    after the sending of the response data from forward request is
    complete.
    
    
    The fix for this APAR is currently targeted for inclusion in
    fixpack 6.1.0.21..  Please refer to the Recommended Updates
    page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PK72336

  • Reported component name

    WEBSPHERE APP S

  • Reported component ID

    5724J0800

  • Reported release

    61A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-09-17

  • Closed date

    2008-09-29

  • Last modified date

    2009-03-30

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

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

    PK73077

Fix information

  • Fixed component name

    WEBSPHERE APP S

  • Fixed component ID

    5724J0800

Applicable component levels

  • R61A PSY

       UP

  • R61H PSY

       UP

  • R61I PSY

       UP

  • R61P PSY

       UP

  • R61S PSY

       UP

  • R61W PSY

       UP

  • R61Z 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":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 December 2021