JR41822: CMVC 218255 - PREVENT A MEMORY LEAK OF DDTHREADCONTEXT OBJECTS IN DOUBLE CLICK SCENARIOS WITHIN WEBSPHERE COMMERCE

7.0.0.9 for Developer Express
7.0.0.9 for Developer Professional
7.0.0.9 for Developer Enterprise
7.0.0-WS-WCServer-FP009
WebSphere Commerce Version 7.0.0.7 Fix Pack
WebSphere Commerce Version 7.0.0.9 Fix Pack

APAR status

• Closed as program error.

Error description

• In specific situations, the Double Click handler will be
  tracking the set of requests that are detected to be repetitive
  (double click) requests from the same user for the same
  parameters.  To help prevent unnecessary processing and
  concurrency issues that can arise due to these situations the
  Double Click Handler feature of WebSphere Commerce will keep
  track of these situations and handle them accordingly.  In the
  process, it is possible for the code which manages these
  requests to keep information in memory which is no longer
  needed, resulting in a memory leak.  If enough objects are
  leaked, performance degradation maybe noted due to a reduction
  in free memory, which may lead to an Out of Memory condition in
  extreme cases.
  

Local fix

• In the event of memory loss, the server can be restarted to
  reset the memory usage.
  

Problem summary

• USERS AFFECTED:
  Users who have enabled the Double Click handling functionality
  of WebSphere Commerce and who frequently have situations where
  users leverage this functionality.
  
  PROBLEM ABSTRACT:
  Memory leak can occur in in the Double Click Handler functions
  of WebSphere Commerce
  
  BUSINESS IMPACT:
  In extreme cases, it is possible that if enough memory is
  leaked, the system can run into Out of Memory errors and have
  reduced performance.
  
  RECOMMENDATION:
  

Problem conclusion

• The Double Click management code now correctly clears
  unnecessary references upon the completion of handling requests
  which triggered the need for double click handling.
  
  -------------------------------------------------------------
  The latest available maintenance information can be obtained
  from the Recommended Fixes for WebSphere Commerce technote:
  http://www.ibm.com/support/docview.wss?rs=3046&uid=swg21261296
  

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

  WC BUS EDITION

• Fixed component ID

  5724I3800

Applicable component levels

• R700 PSY

     UP