PK73340: NO AICA FOR TASK IN NON-YIELDING LOOP ON L8/L9 TCB UNTIL ICVR TIMES 10 HAS BEEN REACHED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A task in a non-yielding loop on a L8/L9 TCB will not get
  AICA'd until ICVR times 10 has been reached.
  If ICVR is set to 3000 ms, the task will be timed out by CICS
  if 30000 ms is reached.
  The expectation is that the timeout will occur after
  3000 ms as is the case with loops on the QR TCB.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Tasks running under L9 TCBs take over   *
  *                      ten times longer to be abended AICA     *
  *                      than they should do.                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  DFHKETIX has logic to multiply by 10 the runaway timeout value
  for those tasks running under non-essential TCBs. This
  adjustment to task runaway timeout was intended to avoid
  Java programs running under J8 TCBs from being invalidly AICA-
  abended while performing CPU-intensive work. However, it means
  that if a threadsafe program (running under an L9 TCB) enters
  into a non-yielding loop, the runaway timeout abend will take
  approximately 10 times longer to occur than is expected.
                                                                 .
  KEYWORDS: Abend AbendAICA AICAs AbendAICAs OTE open transaction
            environment ketix userkey
  

Problem conclusion

• DFHKETIX has been modified to handle tasks running under L9 TCBs
  in the same manner as essential TCB tasks, and not scale up
  their runaway interval by a factor of ten.
  

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:

  UK43344

Modules/Macros

•    DFHKETIX
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R500 PSY UK43344

     UP09/01/23 P F901

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.