PH28547: JPA PERSISTENCE ACTIVATOR RETAINS CLASSLOADER REFERENCES, POTENTIALLY LEADING TO OUTOFMEMORY CONDITION

APAR status

• Closed as program error.

Error description

• The HybridPersistenceActivator, which enables integrating a
  JPA
  persistence provider implementation with Aries OSGi
  applications, uses ClassLoader for the WeakHashMap key,
  which
  prevents its garbage collection.
  

Local fix

• if not needed, do not enable the JPA feature
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty - Java Persistence API       *
  *                  (JPA)                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: JPA Persistence Activator retains       *
  *                      ClassLoader references, potentially     *
  *                      leading to OutOfMemory condition        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The HybridPersistenceActivator, which enables integrating a JPA
  persistence provider implementation with Aries OSGi
  applications, uses ClassLoader for the WeakHashMap key, which
  prevents its garbage collection.
  

Problem conclusion

• The HybridPersistenceActivator has been changed to use
  ModuleMetaData instead of ClassLoader for the key.  When an
  application is stopped, all non-weak references to the
  ModuleMetaData will count down to zero, ensuring that it will be
  Garbage Collected.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 20.0.0.9.  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:

Fix information

• Fixed component name

  LIBERTY PROF -

• Fixed component ID

  5655W6514

Applicable component levels