PK17095: WEBAPPDISPATCHERCONTEXT CORRUPTION DUE TO MULTITHREAD USAGE OF REQUEST OBJECTS

PK17095; 6.0.2.5: webappdispatchercontext corruption due to usage of multithread

APAR status

• Closed as program error.

Error description

• Portal code does not clone contexts correctly.  Showed how a
  similar issue with customer custom code could do the same.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: WebSphere Application Server version         *
  *                 6.0.2 users who try to use threading         *
  *                 to do include or forward by reusing their    *
  *                 request and response objects                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: When request or response objects are    *
  *                      not cloned properly and they are        *
  *                      reused, this leads to corruption in     *
  *                      context objects.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When request or response objects are not cloned properly and
  they are reused, this leads to corruption in context objects.
  Resultant behaviour will be that one can view data from other
  requests. Data viewed by the customer will be corrupted as
  well. Currently clone is used only by IBM stack products.
  
  This problem was happening because of improper handling of
  context objects.
  

Problem conclusion

• The problem was corrected by making sure the context object is
  renewed for every request and in case an old context object
  gets corrupted, create a new one.
  
  The fix for this APAR is currently targeted for inclusion
  in fixpack 6.0.2.9.
  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:

Modules/Macros

• WEBCONT
  

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R60A PSY

     UP

• R60H PSY

     UP

• R60I PSY

     UP

• R60P PSY

     UP

• R60S PSY

     UP

• R60W PSY

     UP

• R60Z PSY

     UP