PI87580: NULLPOINTEREXCEPTIONS FROM WEBCONTAINER CODE

8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• java.lang.NullPointerException from webcontainer code
  
  ###
  WCChannelLink E
  com.ibm.ws.webcontainer.channel.WCChannelLink finishBufferAsynch
  CWSRV8104E: Internal Server Error. Exception Message: [{0}]
  java.lang.NullPointerException
  at com.ibm.ws.webcontainer.channel.WCChannelLink
  .finishBufferAsynch(WCChann elLink.java:604)
  at com.ibm.ws.webcontainer.channel.WCChannelLink
  .finishBufferResponse(WCCha nnelLink.java:586)
  at com.ibm.ws.webcontainer.channel.WCChannelLink
  .releaseChannelLink(WCChann elLink.java:249)
  at com.ibm.ws.webcontainer.channel.WCChannelLink
  .ready(WCChannelLink.java:2 22)
  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink
  .handleDiscriminatio n(HttpInboundLink.java:463)
  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink
  .handleNewRequest(Ht tpInboundLink.java:530)
  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink
  .processRequest(Http InboundLink.java:316)
  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink
  .ready(HttpInboundLi nk.java:287)
  at
  com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback
  .sendToDiscr
  iminators(NewConnectionInitialReadCallback.java:214)
  at
  com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback
  .complete(Ne wConnectionInitialReadCallback.java:113)
  at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener
  .futureCompleted(Ai oReadCompletionListener.java:175)
  at com.ibm.io.async.AbstractAsyncFuture
  .invokeCallback(AbstractAsyncFuture. java:217)
  at com.ibm.io.async.AsyncChannelFuture$1
  .run(AsyncChannelFuture.java:205)
  at
  com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
  
  ###
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application                   *
  *                  Server version 8.0 and 8.5.5 users.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: java.lang.NullPointerException might    *
  *                      occur at the end of a request cycle.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A java.lang.NullPointerException might happen randomly near
  the end of a request.
  A sample of the exception stack:
  WCChannelLink E com.ibm.ws.webcontainer.channel.WCChannelLink
  finishBufferAsynch CWSRV8104E: Internal Server Error.
  Exception Message: [{0}]
  java.lang.NullPointerException
  at
  com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferAsynch
  (WCChannelLink.java:604)
  at
  com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferRespon
  se(WCChannelLink.java:586)
  at
  com.ibm.ws.webcontainer.channel.WCChannelLink.releaseChannelLink
  (WCChannelLink.java:249)
  at
  com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLin
  k.java:222)
  at
  com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscr
  imination(HttpInboundLink.java:463)
  at
  com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRe
  quest(HttpInboundLink.java:530)
  at
  com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequ
  est(HttpInboundLink.java:316)
  at
  com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpI
  nboundLink.java:287)
  at
  com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sen
  dToDiscriminators(NewConnectionInitialReadCallback.java:214)
  at
  com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.com
  plete(NewConnectionInitialReadCallback.java:113)
  at
  com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureComp
  leted(AioReadCompletionListener.java:175)
  at
  com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyn
  cFuture.java:217)
  at
  com.ibm.io.async.AsyncChannelFuture$1.run(AsyncChannelFuture.jav
  a:205)
  at
  com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
  

Problem conclusion

• The WebContainer code was modified to correct the issue.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.0.0.15 and 8.5.5.14.  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 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

• R800 PSY

     UP

• R850 PSY

     UP