PM79582: CICS 4.2 STOPS PROCESSING INTERVAL CONTROL ELEMENTS OR ICE CONTROL BLOCKS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Error Description￘
  You are running CICS transaction server 4.2 and notice your
  interval control elements - referred to as ICE's are not
  getting processed.   The ICE chain continues to grow.
  A dump taken at the time showed  the ICE expiry task, that
  should process these interval control elements, has been
  suspended for close to 6 hours.  Here is this task in
  dispatcher:
  RESOURCE RESOURCE_NAME    W TIME OF
  TYPE                        SUSPEND
  ICEXPIRY DFHAPTIX         S 09:35:09.891
  .
  Looking  at the Timer domain (TI)  we found the timer request
  element or  TRE associated with this task  had an incorrect
  expiry time at offset x'24'. It showed an expiry time of 158
  days from now, which is why the IICEXPIRY task was not waking
  up.
  
  This expiry time is calculated in DFHICP- routine ICSCHXAP.  It
  utilizes field CSATODTU for its calculations.  During this
  calculation, the TCB is interrupted, and this field is updated
  by another task, possibly doing an ASKTIME. When it continues
  its processing, CSATODTU now contains a larger value which
  makes the calculation of the interval to be  incorrect.
  
  Addtional symptoms:
  KIXREVEPH
  ICP_S_NEXT_EXPA_TIME FFFFFF
  
  
  
  
  
  
  
  
  Additional Symptom(s) Search Keyword(s): KIXREVxxx
  

Local fix

• Local Fix￘
  Customer used a monitor to kill one of the ICE's, and this
  caused the expiry task to wake up and process the ICE's.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: DELAY, POST and START commands fail to  *
  *                      expire when expected.                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  DFHICP is driven when a time-dependant request is made.  DFHICP
  uses field CSATODTU, the current time of day, to calculate the
  interval before the ICE expiry task should next be executed.
  CSATODTU is referenced multiple times by DFHICP to make this
  calculation.  If CSATODTU is updated midway through processing
  the resultant interval will be incorrect.  As a consequence the
  ICE expiry task will not be scheduled for execution for a
  considerable time period, preventing the valid execution
  of time-dependant requests.  During this time the ICE chain
  will continue to grow.
  KEYWORDS: ICEXPIRY
  

Problem conclusion

• DFHICP has been modified such that CSATODTU is only referenced
  once during the calculation of the interval before the next
  Expiration Analysis task should be run.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

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

  PM72174

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

  UK93388

Modules/Macros

• DFHICP
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R800 PSY UK93388

     UP13/04/20 P F304

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.