PH21956: JVM CRASH IN ZOSLOGGINGBUNDLEACTIVATOR.NTV_WRITEFILE()

APAR status

• Closed as program error.

Error description

• The ZosLoggingBundleActivator.ntv_writeFile is not
  synchronized
  leading to JVM crashes when more than one thread tries to
  write
  to the MSGLOG at a time.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty for z/OS                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: MSGLOG DD writes are not synchronized   *
  *                      which may lead to JVM termination       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A write to the MSGLOG DD is handled by a WsLogHandler specific
  to a configured MSGLOG DD.  The write routines that are driven
  for messages are not synchronized and may cause the interleaving
  of parts of messages.
  
  Also observed were native failures in the
  ZosLoggingBundleActivator.ntv_writeFile routine which lead to a
  JVM crash.
  

Problem conclusion

• Code was modified in the MsgLogLogHandler's write routine to
  provide synchronization for the write path.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 20.0.0.3.  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

• R850 PSY

     UP