A fix is available
APAR status
Closed as program error.
Error description
You are running CICS Transaction server 5.2 and have a task that experienced various abends. The task has the following TACB's associated with it: AITJ ADK3 and ASPQ Looking at internal trace, the following messages were issued for this task: DFHRM0129 APPLID Intersystem communication failure. Resource updates are being backed out. Local resources maybe out of sync with those on the remote system DFHIS0998 applid A transaction processing a request using IP Interconnectivity has abended with code ASPQ. DFHIS0001 An abend (code 0C4/AKEA) has occurred at offset X'491E' in module DFHISIS The program check occurs when trying to get information to put out for the following message : . DFHAC2251 tranid running program program_name term termid has failed with abend ASPQ. Syncpoint commit processing has failed while communicating with a remote system. . CICS trace shows we issued : XMIQ ENTRY - FUNCTION(INQUIRE_TRANSACTION) XMIQ EXIT FUNCTION(INQUIRE_TRANSACTION) RESPONSE(OK) FACILITY_TYPE(ISSESSION) FACILITY_TOKEN(24CFFE68) . storage at 24CFFE68 - is free at the time of this dump. DFHISIS program checks at offset x'491E' on a MVC instruction, due to R2 containing 7FFFF000. The problem is the principle IS facility, has been deleted- so the code ends up going to low core 00000000+20 to retreive the value 7FFFF000 for the IPCONN control block ISCB. . prior to the program check, we see the following message: DFHIS3030 I APPLID IPCONN name deleted . Eventually the DFHAC2251 is issued with a termid of ???. Additional Symptom(s) Search Keyword(s): KIXREVCHY 0C4 program check ipic IP connection
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: ABEND0C4 at offset 491E into DFHISIS * * when issuing message DFHAC2251. * **************************************************************** * RECOMMENDATION: . * **************************************************************** Two CICS regions are connected via IPIC. The IPCONN in server CICS region is autoinstalled. A DPL request arrived into server region via IPIC. CICS allocates an receive ISSB and attaches the mirror task. An abend happened in mirror task. CICS handles this abend including notifying the remote side and freeing the ISSB. This ISSB isn't owned by this mirror task after getting freed, but the task principal facility still addresses it. Accordingly, DFHTFP is driven to handle the task abend and then lose control. At this time, the IPIC connection is released for some reason. As the IPCONN is autoinstalled, all IPIC resources including the ISSB mentioned above will be freemained. Then DFHTFP get control and continue to run, it checks the task principal facility by addressing the ISSB which has been freemained. An 0C4 abend will happen when it tries to access the ISSB which contains residual values that causes low core accessing.
Problem conclusion
DFHISAL has been changed to clear the principal facility information after ISSB is freed, if ISSB is the principal facility.
Temporary fix
Comments
APAR Information
APAR number
PI82749
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-06-07
Closed date
2017-10-12
Last modified date
2017-11-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI51066 UI51067 UI51068
Modules/Macros
DFHISAL DFHISSR
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R000 PSY UI51068
UP17/10/20 P F710
R100 PSY UI51066
UP17/10/20 P F710
R900 PSY UI51067
UP17/10/20 P F710
Fix is available
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Document Information
Modified date:
01 November 2017