PI97290: NULLPOINTEREXCEPTIONS WHILE ENABLING THE CLASSLOADER TRACES.

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
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
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

• After enabling the Classloader traces, customer was getting
  NullPointerExceptions and preventing them to proceed further
  with the trace enablement. The workaround is to disable the
  classlaoder traces.
  
  WebSphere Application Server v8.5
  Distributed os
  

Local fix

• NA
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: An application classloader may throw    *
  *                      a NullPointerException while loading    *
  *                      a class when classloader trace is       *
  *                      enabled.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  After enabling trace groups "com.ibm.ws.classloader.*" or
  "Websphere ClassLoader", an application classloader may throw a
  NullPointerException while loading an application class:
  [4/3/18 11:20:07:119 CDT] 00000070 webapp E
  com.ibm.ws.webcontainer.webapp.WebApp logServletError
  SRVE0293E:
  [Servlet Error]-[portal]: java.lang.NullPointerException
  at
  com.ibm.ws.classloader.CompoundClassLoader$2.run(CompoundClassL
  o
  ader.java:641)
  at
  com.ibm.ws.classloader.CompoundClassLoader$2.run(CompoundClassL
  o
  ader.java:629)
  at
  com.ibm.ws.security.util.AccessController.doPrivileged(AccessCo
  n
  troller.java:63)
  at
  com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundCl
  a
  ssLoader.java:629)
  at
  java.lang.ClassLoader.loadClass(ClassLoader.java:663)
  at
  com.ibm.wps.state.filter.StateCleanup.doFilter(StateCleanup.jav
  a
  )
  at
  com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(F
  i
  lterInstanceWrapper.java:195)
  at
  com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAp
  p
  FilterChain.java:91)
  at
  com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(Web
  A
  ppFilterManager.java:964)
  at
  com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilter
  s
  (WebAppFilterManager.java:1104)
  at
  com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java
  :
  3819)
  at
  com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.
  j
  ava:304)
  

Problem conclusion

• Apply APAR PI97290 to ensure a WebSphere application
  classloader does not throw a NullPointerException while loading
  a class and classloader trace is enabled.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.16 and 9.0.5.0.  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

• R900 PSY

     UP