A fix is available
APAR status
Closed as program error.
Error description
You can see following error messages: DFHLG0001 AN ABEND (CODE 0C4/AKEA) HAS OCCURRED AT OFFSET X'2AFC' IN MODULE DFHL2CHE. DFHLG0734 A SEVERE ERROR (CODE X'3337') HAS OCCURRED WHILE ACCESSING THE CICS SYSTEM LOG. CICS WILL BE TERMINATED. The failing instruction is CS because R2 points to zero. CS R1,R0,X'2C'(R2) Additional Symptom(s) Search Keyword(s): DFHLG0001 DFHLG0734 DFHL2CHE X'2AFC' KIXREVCHY
Local fix
n/a
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users * **************************************************************** * PROBLEM DESCRIPTION: DFHLG0001 0C4 in DFHL2CHE during a cold * * start. * **************************************************************** CICS was being cold started. CSXM was rebuilding UOWs from the system log that were awaiting a forget flow from a remote system. The UOWs' log chains were moved from DFHLOG to DFHSHUNT and a fork record written to DFHLOG. This logging, combined with a low AKPFREQ of 200, meant that CSXM attached a CSKP transaction to perform an activity keypoint while still initialising the recovery manager domain. This led to a race condition between CSXM and CSKP performing delete history calls - cold start tail deletion for CSXM and log tail deletion for CSKP. CSXM lost control having released the log block for the current browse operation, but before the read token being used for the browse was cleared from the class data used for browsing the primary logstream. This allowed CSKP to reference the read token and attempt to release the same block object, whose address was now null. CSKP attempted to update the use count value, but this resulted in a program check when CICS tried to modify low core storage. KEYWORDS: AKP
Problem conclusion
CICS recovery manager has been changed to prevent activity keypoint operations being scheduled while still performing system log recovery during restart processing.
Temporary fix
Comments
×**** PE19/03/20 FIX IN ERROR. SEE APAR PH09963 FOR DESCRIPTION
APAR Information
APAR number
PH06702
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-12-20
Closed date
2019-01-25
Last modified date
2019-04-08
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI60928 UI60929 UI60930
Modules/Macros
DFHJUP DFHR2TRI DFHRMCD DFHRMCD1 DFHRMCD2 DFHRMCI2 DFHRMCI3 DFHRMCI4 DFHRMDM DFHRMDU0 DFHRMDU2 DFHRMDU3 DFHRMDU4 DFHRMDU5 DFHRML1D DFHRMLK1 DFHRMLK2 DFHRMLK3 DFHRMLK4 DFHRMLK5 DFHRMLKQ DFHRMLN DFHRMLSD DFHRMLSF DFHRMLSO DFHRMLSP DFHRMLSS DFHRMLSU DFHRMNM DFHRMNM1 DFHRMNS1 DFHRMNS2 DFHRMOT DFHRMR1D DFHRMR1E DFHRMR1K DFHRMR1S DFHRMRO DFHRMRO1 DFHRMRO2 DFHRMRO3 DFHRMRO4 DFHRMROO DFHRMROS DFHRMROU DFHRMROV DFHRMRS DFHRMSL DFHRMSL1 DFHRMSL2 DFHRMSL3 DFHRMSL4 DFHRMSL5 DFHRMSL6 DFHRMSL7 DFHRMSLF DFHRMSLJ DFHRMSLL DFHRMSLO DFHRMSLV DFHRMSLW DFHRMST DFHRMST1 DFHRMTRI DFHRMU1C DFHRMU1D DFHRMU1E DFHRMU1F DFHRMU1G DFHRMU1J DFHRMU1K DFHRMU1L DFHRMU1N DFHRMU1Q DFHRMU1R DFHRMU1S DFHRMU1U DFHRMU1V DFHRMU1W DFHRMUC DFHRMUO DFHRMUW DFHRMUW0 DFHRMUW1 DFHRMUW2 DFHRMUW3 DFHRMUWB DFHRMUWE DFHRMUWF DFHRMUWH DFHRMUWJ DFHRMUWL DFHRMUWN DFHRMUWP DFHRMUWQ DFHRMUWS DFHRMUWU DFHRMUWV DFHRMUWW DFHRMXN2 DFHRMXN4 DFHRMXN5 DFHRMXNE
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R000 PSY UI60928
UP19/01/26 P F901 ¢
R100 PSY UI60929
UP19/01/26 P F901 ¢
R200 PSY UI60930
UP19/01/26 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.
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Document Information
Modified date:
08 April 2019