PM74936: CEMT JVMPOOL PHASEOUT RESULTS IN AN ABEND U4080 IN LE AND ABEND999 IN DFHKERPC WHEN RPTS(ON) AND RPTO(ON)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A03 Abends occur when a TCB is terminated while still owning
  active daughter TCBs. When the JVMPOOL PHASEOUT is issued. The
  J9 TCB that was in the process of being destroyed still had
  multiple daughter TCB's still active. CICS uses the
  DestroyJavaVM call to destroy the JVM. While this is going on
  other daughter TCBs are still being created. After the
  DestroyJavaVM call returns back to CICS, CICS calls LE to
  terminate the PIPI environment, which results in abend4080.
  Then CICS  returns back to z/OS on the TCB that is to be
  destroyed so it can end which causes the abendA03 because all
  of the many daughter subtasks of that TCB Still live. They
  still live because the PIPI_Term that would have deleted them
  abends.
  In an AMODE64 environment, the reports are written out to
  STDERR and at the time of the dump, STDERR is not open.
  The abendu4080 (which indirectly causes the abendA03) is
  happening as LE tries to write out the RPTOPTS and RPTSTG
  reports.  With the 64-bit environment used by CICS/TS 4.2, LE
  tries to write those reports to STDERR (which would be in the
  HFS.)  But STDERR is closed at this point and that causes the
  4080.
  With the 31-bit environment used by CICS/TS 4.1, LE tries to
  write  those reports to the MSGFILE which is set to CEEMSG. The
  reason that these files are closed is because CICS has closed
  them. Had CICS not have closed them,they would have been closed
  by LE during PIPI_Term processing. This is redundant and CICS
  need not close the files if LE is going to close them.
  Additional Symptom(s) Search Keyword(s): KIXREVEPH
  RPTOPTS ,  RPTSTG , DFHKE0201 , CEEMSG ,
  CEE03492,DestroyJavaVM , DELETE_TCB , pthread_create ,
  pthread_quiesc
  

Local fix

• Turn off  RPTOPTS and RPTSTG
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: A03 system abend happened during pooled *
  *                      JVM termination if LE runtime option    *
  *                      RPTO or RPTS is turned on.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A pooled JVM begins to run in 64bit LE environment. The LE
  runtime option RPTO(ON) or RPTS(ON) is set to report LE options
  or storage. The JVM works normally. Finally JVMPool is phased
  out and JVMs are destroyed. After destroying the JVM, DFHSJCS
  closes STDIN, STDOUT and STDERR. After that LE is called to
  terminate the PIPI enclave. This process tries to write out the
  reports to STDERR, which fails because STDERR is closed. Failure
  to write out the reports leads to a 4080 abend in LE. The PIPI
  termination processing does not fully complete. Some of the
  threads that have been created by the JVM are still active.
  CICS then tries to delete its J9 TCB. That fails with an abend
  A03 because there are daughter TCBs (threads) that have not yet
  terminated.
  Additional keyword: abendA03, abend4080, RPTO, RPTS
  

Problem conclusion

• DFHSJCS has been changed to redirect STDERR IO stream to CEEMSG
  so that LE reports are written to CEEMSG when RPTO(ON) or
  RPTS(ON) is set as LE runtime options.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK90918

Modules/Macros

•    DFHSJCS
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R703 PSY UK90918

     UP13/01/19 P F301

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.