PM82302: NULLPOINTEREXCEPTION THROWN WHILE TRYING TO GET A SHARED CONNECTION

8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• Client has a system which has robust concurrent traffic.
  Everything is fine at server start. A NullPointerException at
  Shareable Connection occurs on heavy load, and  this error
  appears continuously the in JVM logs. Because of this error our
  clients can not work and  response time is getting higher.
  Before V6.1 was used previously and did not have this problem.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server versions 8.0 and 8.5                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: NullPointerException was thrown while   *
  *                      trying to get a shared connection       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A released connection was not actually removed from the shared
  pool in a particular scenario but its attributes were reset to
  Null. When the next getConnection request tried to read the
  attributes of these connections in the shared pool, the
  NullPointerException was thrown.
  

Problem conclusion

• This fix removes the released connections properly from the
  shared pool and adds a Null check before reading the
  attributes from the connection.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.0.0.7 and the fix pack following 8.5.0.2.  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