PM93829: ASYNC SERVLET LOST ORIGINAL IDENTITY AFTER RESUME

8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
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
8.5.5.9: 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
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
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
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
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

• An UnauthorizedSessionRequestException results in an internal
  server error response when an asynchronous servlet request is
  dispatched by any user other than the user that started the
  asynchronous servlet request.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: An UnauthorizedSessionRequestException  *
  *                      can be thrown after an asynchronous     *
  *                      servlet request is dispatched.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  If a user attempts to access a session which it does not own,
  a
  com.ibm.websphere.servlet.session.UnauthorizedSessionRequestExce
  ption is thrown. This exception can occur if another thread
  processes a dispatch from a different asynchronous request's
  AsyncContext object.
  

Problem conclusion

• The WebContainer code has been updated to capture the security
  context of the thread which starts the asynchronous request
  and uses this during AsyncContext.dispatch(),
  AsyncContext.complete(), and AsyncContext.start() method calls.
  
  To get this new behavior the following new WebContainer custom
  property needs to be set in the server.xml:
  
  
  <webContainer transfercontextinasyncservletrequest="true"/>
  (default
  =false)
  
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 8.5.5.2.  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:

  PM90834

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

Fix information

• Fixed component name

  LIBERTY PROFILE

• Fixed component ID

  5724J0814

Applicable component levels

• R850 PSY

     UP