PI89806: NULLPOINTEREXCEPTION GENERATED WHEN USING ASYNC SERVLET AND PMI ON WEBSPHERE APPLICATION SERVER V9

9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
WebSphere Application Server traditional 9.0.5.6
9.0.5.7: WebSphere Application Server traditional Version 9.0.5 Fix Pack 7
9.0.5.8: WebSphere Application Server traditional Version 9.0.5.8
9.0.5.9: WebSphere Application Server traditional Version 9.0.5.9
9.0.5.10: WebSphere Application Server traditional Version 9.0.5.10
9.0.5.11: WebSphere Application Server traditional Version 9.0.5.11

APAR status

• Closed as program error.

Error description

• If PMI is enabled and the application is using Asyncservlet
  request, the following NullPointerException is generated in the
  SystemOut.log:
  
  webapp        E
  com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E:
  [Servlet Error]-[ServletNameNotFound]:
  java.lang.NullPointerException
  at com.ibm.ws.webcontainer.WebAppPmiListener
        .onStartAsync(WebAppPmi Listener.java:407)
  at com.ibm.ws.webcontainer.srt.SRTServletRequest
        .startAsync(SRTServletRequest.java:3603)
  at za.co.sepia.v4.cobrowse.async.AsyncWorkUtil
        .waitForContent(AsyncWorkUtil.java:68)
  at za.co.sepia.v4.cobrowse.CoBrowseFilter
        .doFilter(CoBrowseFilter.java:326)
  at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper
        .doFilter(FilterInstanceWrapper.java:197)
  at com.ibm.ws.webcontainer.filter.WebAppFilterChain
        .doFilter(WebAppFilterChain.java:90)
  at com.ibm.ws.webcontainer.filter.WebAppFilterManager
        .doFilter(WebA ppFilterManager.java:969)
  at com.ibm.ws.webcontainer.filter.WebAppFilterManager
        .invokeFilters(WebAppFilterManager.java:1109)
  

Local fix

• Disable PMI on the server
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server            *
  *                  traditional version 9.0 users of            *
  *                  WebContainer.                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: A java.lang.NullPointerException        *
  *                      might be thrown when using async        *
  *                      servlets and Performance Monitoring     *
  *                      Infrastructure (PMI)                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When an application uses async requests, PMI is enabled, and
  there is an async filter, a java.lang.NullPointerException
  might thrown if there is no target servlet mapped to the
  request URI.
  

Problem conclusion

• The WebContainer code has been modified to avoid the
  NullPointerException.
  
  The fix for this APAR is currently targeted for inclusion in
  fixpack 9.0.0.7. 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

• R900 PSY

     UP