A fix is available
APAR status
Closed as program error.
Error description
During file open, DFHFCNO makes a IGWARLS call to find out the catalog recovery setting for the dataset. (This call is for non-RLS files as well as RLS files.) It is possible for this call to result in the TCB suspending on MVS ENQs and Catalog Locate SVC calls. DFHFCNO makes the IGWARLS call on the QR TCB. It would be more appropriate for DFHFCNO to switch to the FO TCB before making that call.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All * **************************************************************** * PROBLEM DESCRIPTION: Potential delays while executing * * IGWARLS calls from DFHFCN. * **************************************************************** * RECOMMENDATION: * **************************************************************** DFHFCN file open logic issues an IGWARLS call to DFSMS. This may be intercepted by vendor code, and this can result in delays due to (e.g.) MVS WAITs or ENQs being issued, and the additional pathlength being executed. Since the IGWARLS calls are issued under the QR TCB, this can degrade transaction throughput and affect response times while this TCB is unavailable to dispatch other work within CICS. KEYWORDS: FCNO DFHFCNO VSAM IAM
Problem conclusion
DFHFCN has been modified to switch to the FO TCB around the IGWARLS call to DFSMS.
Temporary fix
FIX AVAILABLE BY PTF ONLY
Comments
**** PE08/01/18 FIX IN ERROR. SEE APAR PK59523 FOR DESCRIPTION
APAR Information
APAR number
PK58235
Reported component name
CICSTS V3 Z/OS
Reported component ID
5655M1500
Reported release
400
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2007-12-17
Closed date
2007-12-21
Last modified date
2008-02-08
APAR is sysrouted FROM one or more of the following:
PK58301
APAR is sysrouted TO one or more of the following:
UK32584 UK32591
Modules/Macros
DFHFCN DFHFCNO
Fix information
Fixed component name
CICSTS V3 Z/OS
Fixed component ID
5655M1500
Applicable component levels
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 February 2008