PI47103: JAVA.LANG.NULLPOINTEREXCEPTION WHEN USING ASYNC SERVLETS AND PMI

PI47103:java.lang.nullpointerexception when using async servlets and pmi
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
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

• Details: When an application uses async servlets and PMI is
  enabled a java.lang.NullPointerException might be seen. The
  following is an example of the stack trace generated:
  
  java.lang.NullPointerException
  at
  com.ibm.ws.webcontainer.WebAppPmiListener.onComplete(WebAppPmiLi
  stener.java:363)
  at
  com.ibm.ws.webcontainer.async.AsyncListenerEntry.invokeOnComplet
  e(AsyncListenerEntry.java:85)
  at
  com.ibm.ws.webcontainer.async.CompleteRunnable.invokeOnComplete(
  CompleteRunnable.java:61)
  at
  com.ibm.ws.webcontainer.async.CompleteRunnable.run(CompleteRunna
  ble.java:40)
  at
  com.ibm.ws.webcontainer.async.WSCompleteRunnable.run(WSCompleteR
  unnable.java:44)
  at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:809)
  ... 5 more
  

Local fix

• Disable PMI on the server.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Full       *
  *                  Profile version 8.5 users of async          *
  *                  requests and Performance Monitoring         *
  *                  Infrastructure(PMI).                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: A java.lang.NullPointerException        *
  *                      might occur when using async requests   *
  *                      and PMI                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When an application uses async requests and PMI is enabled,
  and there is an async filter doing a forward, a
  java.lang.NullPointerException will be seen. The following is
  an example of the stack trace generated:
  java.lang.NullPointerException
  at
  com.ibm.ws.webcontainer.WebAppPmiListener.onComplete(WebAppPmiLi
  stener.java:363)
  at
  com.ibm.ws.webcontainer.async.AsyncListenerEntry.invokeOnComplet
  e(AsyncListenerEntry.java:85)
  at
  com.ibm.ws.webcontainer.async.CompleteRunnable.invokeOnComplete(
  CompleteRunnable.java:61)
  at
  com.ibm.ws.webcontainer.async.CompleteRunnable.run(CompleteRunna
  ble.java:40)
  at
  com.ibm.ws.webcontainer.async.WSCompleteRunnable.run(WSCompleteR
  unnable.java:44)
  at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:809)
  ... 5 more
  

Problem conclusion

• The WebContainer code was modified to avoid the exception.
  
  The fix for this APAR is currently targeted for inclusion in
  fixpack 8.5.5.9.
  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

• R850 PSY

     UP