PM69483: DEADLOCK BETWEEN THREADS WHEN DETAILED TRACE ENABLED WITH SOME J VMS

8.5.0.1: WebSphere Application Server V8.5 Fix Pack 1
8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2

APAR status

• Closed as program error.

Error description

• Server may stop responding to requests depending on the nature
  of the deadlock
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile with detailed trace  *
  *                  enabled.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: formatMessage may have been             *
  *                      implemented as a synchronized method.   *
  *                      There is a small chance of              *
  *                      encountering a deadlock when issuing    *
  *                      messages using java.util.logging.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A deadlock occurred with trace enabled: competing stack traces
  around the held locks contain calls to
  java.util.logging.Formatter.formatMessage.
  

Problem conclusion

• A custom implementation of
  java.util.logging.Formatter.formatMessage has been created to
  override the default, potentially synchronized, parent
  implementation.
  
  
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.0.1. 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 PROFILE

• Fixed component ID

  5724J0814

Applicable component levels

• R850 PSY

     UP