A fix is available
APAR status
Closed as program error.
Error description
CICS is at MXT. Tasks are suspended on resource ENQUEUE KCSTRING and CCSTWAIT VSMSTRNG. One of the tasks suspended on the string wait (VSMSTRNG) is the owner of the ENQUEUE KCSTRING "DFHTOR:tt:mm". The strings are held by tasks waiting for the Enqueue. Therefore, we have a deadlock. This is a timing problem, very similar to APAR PK18930 but in this case the EXEC CREATE TERMINAL is for non-pooled terminals.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS Users. * **************************************************************** * PROBLEM DESCRIPTION: Tasks are suspended on ENQUEUE KCSTRING * * "DFHTOR:tt:mm" and some are waiting * * CCSTWAIT VSMSTRNG. The owner of the * * ENQUEUE is suspended on the string wait * * (VSMSTRNG) but the strings are all held * * by tasks waiting for the same enqueue. * * These tasks are deadlocked. * **************************************************************** A task which holds an exclusive ENQ on STRING 'DFHTOR:tt:mm' is waiting for a VSAM thread but all those VSAM threads are held by tasks that are queued waiting to ENQ on STRING 'DFHTOR:tt:mm'. Each task is running an EXEC CICS CREATE TERMINAL command for non-pooled terminals.
Problem conclusion
DFHAMPIL has been changed to isolate EXEC CICS CREATE TERMINAL commands by issuing a further enqueue "CREATE_TERMINAL".
Temporary fix
Comments
APAR Information
APAR number
PH01094
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-07-31
Closed date
2019-02-27
Last modified date
2019-03-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI61536 UI61537 UI61540
Modules/Macros
DFHAMPIL
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R000 PSY UI61536
UP19/02/28 P F902
R100 PSY UI61537
UP19/02/28 P F902
R200 PSY UI61540
UP19/02/28 P F902
Fix is available
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Document Information
Modified date:
01 March 2019