PM20979: JAVA.LANG.NOCLASSDEFFOUNDEXCEPTION DURING SERVANT REGION SHUTDOWN

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• User sees NoClassDefFoundException during Servant Region
  shutdown as the following:
  
  Trace: 2010/05/21 12:46:58.858 01 t=8FF3C0 c=UNK key=P8
  (13007002)
    ThreadId: 00000000
    FunctionName: com.ibm.ws.runtime.WsServerImpl
    SourceId: com.ibm.ws.runtime.WsServerImpl
    Category: AUDIT
  ExtendedMessage: BBOO0222I: WSVR0024I: Server SERVANT PROCESS
  bbdsr31 stopped
  Exception in thread "Non-deferrable Alarm : 1"
  java.lang.NoClassDefFoundError: com.ibm.ffdc.Manager
          at com.ibm.ejs.util.am._Alarm.run(_Alarm.java:129)
          at
  com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
  Caused by: java.lang.ClassNotFoundException:
  com.ibm.ffdc.Manager
          at java.lang.Throwable.<init>(Throwable.java:80)
  at
  java.lang.ClassNotFoundException.<init>(ClassNotFoundException.j
  ava:77)
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V6.1.0                               *
  ****************************************************************
  * PROBLEM DESCRIPTION: Alarm threads that have not yet ceased  *
  *                      during server shutdown can see          *
  *                      NoClassDefFoundErrors when attempting   *
  *                      to write to FFDC.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During server shutdown, it is possible for active Alarm
  threads to attempt to write to FFDC after the FFDC component
  has stopped.  Because the component is no longer active, the
  logging attempt fails with a NoClassDefFoundError.
  

Problem conclusion

• Logic has been added to the Alarm to use alternate logging
  when FFDC is unavailable.
  
  APAR PM20979 is currently targeted for inclusion in
  Service Level (Fix Pack) 6.1.0.37 of WebSphere
  Application Server V6.1.
  
  Please refer to URL:
  //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack availability.
  

Temporary fix

Comments

• ž**** PE12/01/31 FIX IN ERROR. SEE APAR PM57038  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PM20978

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R610 PSY UK65883

     UP11/04/06 P F104

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.