PM14128: REMOTE INVALIDATION OF TRANSACTION-AWARE CACHES USING A FIRST LE VEL CACHE FAILS IN CLUSTER

APAR status

• Closed as program error.

Error description

• When using the first level cache in conjunction with
  transaction-aware caches, cache invalidations are not issued on
  remote servers of a WebSphere Portal cluster.
  In case of the 'com.ibm.wps.pe.portletentity' cache instance,
  this may lead to changes of portlet settings not being available
  across the servers in a cluster. In addition, a
  java.util.ConcurrentModificationException may be found in the
  log files, because servers access stale objects from the cache.
  

Local fix

• A workaround is to disable the first level cache by setting the
  first level cache size of the cache in question to zero (0).
  For
  example, to disable the first level cache of the
  'com.ibm.wps.pe.portletentity' cache, add the following
  property
  to the WP CacheManagerService resource environment provider:
  cacheinstance.com.ibm.wps.pe.portletentity
  .firstLevelCacheSize=0
  
  Note: Disabling the first level cache may have a negative
  impact
  on the performance of the IBM WebSphere Portal environment.
  

Problem summary

• When using the first level cache in conjunction with
  transaction-aware caches, cache invalidations are not issued on
  remote servers of a WebSphere Portal cluster.  In case of the
  'com.ibm.wps.pe.portletentity' cache instance, this may lead to
  changes of portlet settings not being available across the
  servers in a cluster. In addition, a
  java.util.ConcurrentModificationException may be found in the
  log files, because servers access stale objects from the cache.
  

Problem conclusion

• The first level cache has been modified in that it also
  registers the invalidation listener on the underlying
  distributed map of a wrapped transaction-aware cache.
  
  Failing Module(s):
     Portlet Container
  
  Affected Users:
     All
  
  Version Information:
     Portal Version(s): 6.1.0.3
      Pre-Requisite(s): ---
       Co-Requisite(s): ---
  
  Manuel Steps:
     None
  
  Platform Specific:
     This fix applies to all platforms.
  
  PM14128 is part of Cumulative Fix 05 for Portal 6.1.0.3 /
  6.1.5.0.
  
  The Cumulative Fix is available from Fix Central:
  
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PM13061&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

• R61C PSY

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