PI53611: CPIH TRANSACTIONS BACK UP IN LMQUEUE WAIT - PIIMLOCK

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A backup of CPIH transactions in the region is observed. The
  CPIH tasks are all suspended on resource type LMQUEUE. From a
  dump of the region, Lock Manager shows the lock they are
  waiting on is PIIMLOCK. From LM domain we can get the lock
  owner's KE_TASK/TASENTRY, however, at dump time the real lock
  owner has already gone and it's TASENTRY has been reused by
  another task.
  
  Kernel error table shows the real lock owner task got 999
  (Runaway) abend at a previous time. DFHPIRS was in incontrol
  when the  loop was detected.
  
  This is identical to apar PI44634 which was closed RET
  
  Additional Symptom(s) Search Keyword(s): KIXREVCTC PI44634
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Loop in DFHPIIM causing AICA abend and  *
  *                      retention of PIIM lock.                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The loop termination condition in PIIM_LOOKUP_CTX_TOKEN is
  incorrect which can result in an infinite loop and AICA abend
  when the context token is not found in the scan.
  This causes recovery to be entered while the PIIMLOCK is still
  held and eventually the system will hang as a result.
  KEYWORDS: PI44634
  

Problem conclusion

• Module DFHPIIM has been changed to correct the scanning loop so
  that the AICA abend does not occur, and to ensure that the PIIM
  lock is always released.
  

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:

  PI56470 UI35321

Modules/Macros

• DFHPIAD  DFHPIAT  DFHPIA1  DFHPICA  DFHPICC  DFHPIDM  DFHPIDSH
  DFHPIDUF DFHPIII  DFHPIIW  DFHPILN  DFHPIMM  DFHPIPL  DFHPIPM
  DFHPIPM2 DFHPIPS  DFHPIRE  DFHPIRI  DFHPIRM  DFHPIRS  DFHPISC
  DFHPISF  DFHPISN  DFHPIST  DFHPITC  DFHPITC1 DFHPITC2 DFHPITC3
  DFHPITE  DFHPITH  DFHPITL  DFHPITQ  DFHPITRI DFHPITS  DFHPIUE
  DFHPIWR  DFHPIWT  DFHPIXI  DFHPIXM  DFHPIXO  DFHWSADH DFHWSATR
  DFHWSATX
  

Fix information

• Fixed component name

  CICS TS Z/OS V4

• Fixed component ID

  5655S9700

Applicable component levels

• R700 PSY UI35321

     UP16/02/19 P F602

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.