PH69915: TASK PURGED DURING PROGRAM LOAD DOES NOT RELEASE PPTE LOCK

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS was processing many EXEC CICS LOADs for the same program
  from many concurrent T8 tasks.
  During the processing of one LOAD, the task acquired a lock on
  the program's PPTE.
  Then the task entered an LMQUEUE suspend to acquire
  the PGLOCK.
  While it was in this suspend, a FORCEPURGE was
  issued for the task.
  When CICS processed the PURGED response PG domain did not
  detect that the task held a lock on the PPTE; therefore, CICS
  did not attempt to free that lock.
  After the task termipglocknated,
  the PPTE remained in a locked status, and any subsequent tasks
  attempting a LOAD for this program were placed in a suspend for
  resource for the program.
  Additional symptoms:
  Region hung hang many tasks suspended on
  Resource Type PROGRAM with the same program
  name under Resource Name
  Release_Program_Lock LMQUEUE
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS tasks stalled on Program Lock      *
  *                      for the same program.                   *
  ****************************************************************
  CICS is processing many concurrent tasks which each
  cause many EXEC CICS LOAD commands to be issued.
  Automation issues FORCEPURGE against one or more of the
  tasks.
  CICS PG domain does not handle the PURGED response correctly
  and leaves the PPTE "Program Lock" set on, which causes
  other tasks to queue indefinitely, waiting for the lock
  which will never be released.
  Additional Keywords: PPTE_PROGRAM_LOCK
  

Problem conclusion

• CICS, PG domain, has been changed to ensure that
  the PPTE's Program Lock is released as part of
  PURGE processing.
  

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:

  UO09511 UO09512

Modules/Macros

• DFHPGLD
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R500 PSY UO09512

     UP26/09/19 P F609

• R600 PSY UO09511

     UP26/09/25 P F609

Fix is available

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