PM09871: OBJECTS IN SESSION BOUND CACHE OUTLIVE HTTP SESSION

APAR status

• Closed as program error.

Error description

• Certain Portal artifacts are stored in a session bound cache.
  This cache, in turn, uses a ThreadlessObjectCache to store the
  actual objects. However, when the HTTP session times out, the
  session bound cache does not properly invalidate the respective
  objects in the ThreadlessObjectCache. These object, therefore,
  exist longer than HTTP session which may appear like a memory
  leak. Of course, these objects are still cleared once the
  timeout for the underlying ThreadlessObjectCache occurs; still,
  on a constrained environment this may lead to an
  OutOfMemeoryException.
  

Local fix

• In order to minimize the effect of this problem, please consider
  reconfiguring the underlying cache according to the following
  technote:
  
  http://www-01.ibm.com/support/docview.wss?uid=swg21379940
  

Problem summary

• Certain Portal artifacts are stored in a session bound cache.
  This cache, in turn, uses a ThreadlessObjectCache to store the
  actual objects. However, when the HTTP session times out, the
  session bound cache does not properly invalidate the respective
  objects in the ThreadlessObjectCache. These object, therefore,
  exist longer than HTTP session which may appear like a memory
  leak. Of course, these objects are still cleared once the
  timeout for the underlying ThreadlessObjectCache occurs; still,
  on a constrained environment this may lead to an
  OutOfMemeoryException.
  

Problem conclusion

• This APAR ensures that all objects pertaining to the session
  bound cache are properly invalidated in the underlying
  ThreadlessObjectCache.
  
  Manual Steps:
     None
  
  Failing Module(s):
     Engine: State handling
  
  Affected Users:
     All users
  
  Version Information:
      Portal Version(s): 6.1.0.1
       Pre-Requisite(s):
        Co-Requisite(s): ---
  
      Portal Version(s): 6.1.0.2
       Pre-Requisite(s):
        Co-Requisite(s): ---
  
  PM09871 is also part of Cumulative Fix 03 for Portal 6.1.0.3.
  
  The Cumulative Fix is available on Fix Central:
  
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM09968&productid=WebSphere%20Portal&brandid=5
  
  Platform Specific:
     This fix applies to all platforms.
  
  A fix is available from Fix Central:
  
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM09871&productid=WebSphere%20Portal&brandid=5
  
  You may need to type or paste the complete address into your Web
  browser.
  

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 PORTA

• Fixed component ID

  5724E7600

Applicable component levels

• R61A PSY

     UP

• R61B PSY

     UP

• R61C PSY

     UP