PI29885: WHILE USING THE ASYNC THREADS INSIDE THE MAIN THREAD, SESSIONI MANAGER CODE THROWS INDEXOUTOFBOUNDSEXCEPTION.

8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
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
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
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

• While using the Async threads inside the main thread, sessioni
  manager code throws IndexOutOfBoundsException. This is due to
  the race condition between the main thread and sub thread.
  
  ######
  java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
          at
  java.util.LinkedList.checkElementIndex(LinkedList.java:564)
          at java.util.LinkedList.remove(LinkedList.java:534)
          at
  com.ibm.ws.session.SessionAffinityManager.setNextId(SessionAffin
  ityManager.java:245)
          at
  com.ibm.ws.session.SessionManager.getSession(SessionManager.java
  :701)
          at
  com.ibm.ws.session.SessionContext.getIHttpSession(SessionContext
  .java:466)
          at
  com.ibm.ws.session.SessionContext.getIHttpSession(SessionContext
  .java:426)
  
  ######
  
  WebSphere Application Server V8.5
  Distributed operating systems.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server version    *
  *                  8.0                                         *
  *                  and 8.5.5 users.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: The session manager may throw a         *
  *                      java.lang.IndexOutOfBoundsException     *
  *                      when using asynchronous threads.        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When invoking the
  javax.servlet.http.HttpServletRequest.getSession() method
  after the HTTP session is invalidated in the asynchronous
  thread, the session manager may throw a
  java.lang.IndexOutOfBoundsException.
  

Problem conclusion

• Code changes were made to the session manager to handle the
  asynchronous threads correctly.
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 8.0.0.11 and 8.5.5.6. 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

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R800 PSY

     UP

• R850 PSY

     UP