PK76880: CICS TASK HANGS FOR 8 HOURS WAITING FOR PROGRAM. DUMP SHOWS X'49' OF PPTE OF PROGRAM IS '00'.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• CICS task hangs for 8 hours waiting on program.  The dump shows
  x'49' of PPTE of program is x'00'.
  LD=1 shows the this program was used 70 times after load. Yet,
  CICS shows it is suspended at 'PROGRAM WAIT' in spite of
  setting of x'49' in PPTE.  The ppte_program_lock_bit was set to
  x'02' (offset x'39').
  This APAR is being taken to add code that provides PGLOCK'g
  in ?delete_program: in DESPGDD.  Here the PGLOCK has just been
  released and then the code does:
     if ppte_pgwe then
       :getref.resume_waiters
  Not having the PGLOCK code in resume_waiters could potentially
  cause a task to be orpahaned on the PGWE.
  Additional Symptom(s) Search Keyword(s):
  KIXREVRJS
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: CICS tasks hang waiting on program.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Concurrent updating of the byte ppte_indicator_flags has
  resulted in its bits not showing the true state of the PGWE
  chain. This can lead to tasks to be orphaned on the chain and
  tasks waiting indefinitely.
  Keywords: ppte_pgwe ppte_add_in_progress
  

Problem conclusion

• DFHPGAI, DFHPGDD and DFHPGRP have been changed to ensure a lock
  is obtained so that the updating of these bits is serialised.
  

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:

  UK44130 UK44131 PK81060

Modules/Macros

•    DESPGAI  DESPGDD  DESPGDD1 DESPGRP  DFHPGAI
  DFHPGDD  DFHPGRP
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R400 PSY UK44130

     UP09/02/21 P F902

• R500 PSY UK44131

     UP09/02/21 P F902

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.