A fix is available
APAR status
Closed as program error.
Error description
An EXCI batch user application coded the following command specifying a CICS program, rather than one of their own. EXEC CICS LINK PROGRAM('DFHMIRS') This caused the mirror transaction to loop, repetitively calling itself. This in turn caused CICS to go short on storage due to all the areas getmained to handle these links.. like kernel stacks and PLCB control blocks. The region eventually hung and had to be recycled. Additional keywords: KIXREVRJL DFHSM0133 MSDFHSM0133 ABENDAKEG AKEG DFHAP0001 MSDFHAP0001
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All * **************************************************************** * PROBLEM DESCRIPTION: DFHSM0133 issued when CICS goes short * * on storage. * **************************************************************** * RECOMMENDATION: * **************************************************************** The CICS mirror program DFHMIRS fails to check that it has received a request to execute an EXEC CICS LINK PROGRAM command that specifies DFHMIRS itself as the linked to program. A user of the CICS External Interface EXCI can incorrectly specify DFHMIRS as the name of the EXCI server program. For example the sample EXCI client program DFH$AXCC can be changed to specify a target server program name of DFHMIRS instead of DFH$AXCS. When the EXCI batch job is run to execute the EXCI client program and to link to the EXCI server program in the CICS server region, the client program loops repeatedly calling DFHMIRS. This can lead to the short on storage condition, and other failures such as AKEG transaction abends. The CICS region can become unresponsive so that it has to be terminated and restarted. The CICS mirror program has an alias of DFHMIRR so that the same failure can occur if this name is specified as target server program name. Additional keywords: msgDFHSM0133 SM0133 0133 abendAKEG
Problem conclusion
The mirror program DFHMIRS is changed to perform additional checks when it receives a request to execute an EXEC CICS LINK PROGRAM command. If the name of the program to be linked to is DFHMIRS or DFHMIRR, instead of executing the command the mirror program performs a transaction abend with abend code AITM. ------------------------------------------------- The CICS Transaction Server for z/OS CICS Messages and Codes Version 3 Release 1 (manual GC34-6442-04) is to be updated to the following new abend code: AITM Explanation: A command has been received by the mirror program to call itself. System action: The task is abnormally terminated with a CICS transaction dump. User response: Correct the API command in the client system program so that is does not request an EXEC CICS LINK PROGRAM to be executed that specifies the name of the mirror program. Module: DFHMIRS ------------------------------------------------- The CICS Transaction Server for z/OS CICS Messages and Codes Version 3 Release 2 (manual GC34-6827-01) is to be updated to the following new abend code: AITM Explanation: A command has been received by the mirror program to call itself. System action: The task is abnormally terminated with a CICS transaction dump. User response: Correct the API command in the client system program so that is does not request an EXEC CICS LINK PROGRAM to be executed that specifies the name of the mirror program. Module: DFHMIRS
Temporary fix
********* * HIPER * ********* FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PK68814
Reported component name
CICSTS V3 Z/OS
Reported component ID
5655M1500
Reported release
400
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2008-07-10
Closed date
2008-08-28
Last modified date
2008-09-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK39364 UK39365
Modules/Macros
CHAPT024 DFHMIRS
GC34644204 | GC34682701 |
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:
02 September 2008