PH59243: NULLPOINTEREXCEPTION IN SIP CODE

APAR status

• Closed as program error.

Error description

• NullPointerException was seen in TextLog's on customer system
  appear several times during few minute timespan. Stack trace is
  same in all cases per below:
  
  
  [1/2/24 18:45:49:531 AEDT] 0004f09f TransportComm E
  TransportCommLayerMgr CWSCT0315E: Exception in SIP Stack.
  [1/2/24 18:45:49:532 AEDT] 0004f09f TransportComm E
  TransportCommLayerMgr
  java.lang.NullPointerException
  at com.ibm.ws.sip.stack.transaction.transactions.st.SIPServerTr
  ansactionImpl.isRequestPartOfTransaction(SIPServerTransactionIm
  pl.java:94)
  at com.ibm.ws.sip.stack.transaction.transactions.SIPTransaction
  sModel.getServerTransaction(SIPTransactionsModel.java:132)
  at com.ibm.ws.sip.stack.transaction.SIPTransactionStack.prosses
  TransportSipMessage(SIPTransactionStack.java:334)
  at com.ibm.ws.sip.stack.transaction.transport.TransportCommLaye
  rMgr.onMessage(TransportCommLayerMgr.java:1580)
  at com.ibm.ws.sip.stack.transaction.transport.TransportCommLaye
  rMgr.onRead(TransportCommLayerMgr.java:1296)
  at com.ibm.ws.sip.stack.dispatch.Dispatcher.queueIncomingDataEv
  ent(Dispatcher.java:279)
  at com.ibm.ws.sip.stack.transaction.transport.connections.chann
  elframework.BaseConnection.messageReceived(BaseConnection.java:
  98)
  at com.ibm.ws.sip.stack.transaction.transport.connections.chann
  elframework.SipConnLink.complete(SipConnLink.java:512)
  at com.ibm.ws.sip.stack.transaction.transport.connections.chann
  elframework.SipInboundConnLink.complete(SipInboundConnLink.java
  :98)
  at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.future
  Completed(AioReadCompletionListener.java:175)
  at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(Abstract
  AsyncFuture.java:217)
  at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(As
  yncChannelFuture.java:161)
  at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
  at
  com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
  at com.ibm.io.async.ResultHandler.runEventProcessingLoop(Result
  Handler.java:775)
  at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
  at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1909)
  

Local fix

• No local fix
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Users can encounter a                   *
  *                      NullPointerException in server trace    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When checking if a request is part of a transaction the
  sipcontainer is looking to find associated branches. At this
  point
  a NullPointerException can occur.
  

Problem conclusion

• The sipcontainer will now catch the NullPointerException and
  not
  let it show up in the trace by default.
  
  The fix for this APAR is targeted for inclusion in fix pack
  9.0.5.20 and in the next 8.5.5.26 release. For more
  information, see 'Recommended Updates for WebSphere
  Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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