PH58620: CICS JVM server recycle following crash in DTC module DFHTRC64

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After encountering a GPF exception the JVM is disabled and
  CICS needs to be recycled in order to re-enable it.
  The Java core dump confirms that the exception occurs in :
  
  com/ibm/cics/delegate/impl/DelegateWrapperImpl.SetCommArea
  
  and the joblog shows :
  
  JVMDUMP039I Processing dump event "gpf", detail "" ...
  JVMDUMP032I JVM requested System dump using ...
  ...
  DFHSJ0007 Unexpected signal received by JVMSERVER: xxxxxx
            JVMSERVER xxxxxx is being disabled and
            restarted by CICS because the signal SIGSEGV (11)
            was delivered to the JVM process, leaving the
            JVMSERVER in an inconsistent state.
  DFHSJ0008 JVMSERVER xxxxxx is being disabled and restarted
            by CICS because of an unexpected termination of
            the JVM
  
  Keywords: Upgrade2CICS61
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS JVM server is recycled due to a    *
  *                      crash resulting from residual DTC data  *
  *                      associated with the pthread.            *
  ****************************************************************
  If a JVM server incorrectly has residual DTC data associated
  with the pthread and no active task running on that pthread,
  then it will crash in DTC module DFHTRC64, causing the JVM
  server to recycle.
  

Problem conclusion

• CICS has been changed so that this crash will no longer occur
  if there is residual pthread DTC data.
  FIXCAT: SWPSP/K
  

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:

  UI96268

Modules/Macros

• DFJ@H356
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI96268

     UP24/03/28 P F403

Fix is available

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