A fix is available
APAR status
Closed as program error.
Error description
QR TCB is stuck in a wait out of DFHKETA on the KCB_KE_LOCK. The CO TCB is the owner of that lock but is simply in a normal no-work wait out of DFHDSDS3. Lots of CWXN tasks are dispatchable on the QR TCB but the QR TCB is stuck in the wait out of DFHKETA Additional Symptom(s) Search Keyword(s): KIXREVDWZ
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users * **************************************************************** * PROBLEM DESCRIPTION: CICS hangs when CO TCB fails to unlock * * the CICS kernel lock * **************************************************************** * RECOMMENDATION: * **************************************************************** A RACF change is made in the system and then an ENF notification comes into CICS. CICS runs a system task on the CO TCB to handle the ENF event because DFHSIT parameter SUBTSKS=1 is set. After this system task completes, the CO TCB obtains a kernel lock to first release the task back to the system, and then do an unlock. Just before the unlock, a pointer that CO TCB will use is changed because of a new system task being attached on the QR TCB which results in an unlock failure. Later all CICS TCBs wait indefinitely for the kernel lock and CICS begins to hang.
Problem conclusion
DFHKERN and DFHKEMT have been changed to avoid the unlock failure when detaching tasks.
Temporary fix
********* * HIPER * ********* FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PI14206
Reported component name
CICS TS Z/OS V4
Reported component ID
5655S9700
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2014-03-21
Closed date
2014-06-15
Last modified date
2014-09-08
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
DFHKERN DFHKETA
Fix information
Fixed component name
CICS TS Z/OS V4
Fixed component ID
5655S9700
Applicable component levels
R700 PSY UI19017
UP14/07/04 P F407 ½
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 September 2014