A fix is available
APAR status
Closed as program error.
Error description
CICS region was using excessive CPU and it appears we have a recursive abend in transaction CISS related to a new IPIC definition. . CICS was cancelled with a dump. Dump shows: A CISS task looping on the SO TCB with repeating 0C4/AKEX issued by DFHLEPTQ +x216 in its recovery routine on instruction 5000 7020 ST R0,32(,R7) This CISS task also owns an S8 TCB . CICS has gone MXT with CISS tasks which arrived after the first CISS went into the loop on SO TCB.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users * **************************************************************** * PROBLEM DESCRIPTION: High CPU usage after abend on an S8 TCB * * resulting in a loop in DFHLEPTQ * * recovery. * **************************************************************** An abend occurs on an S8 TCB which drives recovery in DFHLEPTQ on a different TCB. DFHLEPTQ issues a change mode to the S8 TCB which fails. DFHLEPTQ assumes that we are running on the S8 TCB and drives a codepath which is inappropriate for the TCB which we are running on. This leads to an abend 0C4 which drives the same recovery routine again resulting in a recursive loop. Additional Keywords: abendAKEX abend0C4
Problem conclusion
DFHLEPTQ has been changed to check for the response from the change mode request and percolate if there is an error.
Temporary fix
Comments
APAR Information
APAR number
PH18483
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
2019-10-24
Closed date
2020-04-28
Last modified date
2020-06-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI69227 UI69228 UI69229 UI69230
Modules/Macros
DFHLEPT@ DFHLEPTD DFHLEPTQ
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R000 PSY UI69227
UP20/04/30 P F004 ¢
R003 PSY UI69228
UP20/04/30 P F004 ¢
R100 PSY UI69229
UP20/05/07 P F005 ¢
R200 PSY UI69230
UP20/04/29 P F004 ¢
Fix is available
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Document Information
Modified date:
02 June 2020