A fix is available
APAR status
Closed as program error.
Error description
The following series of events happens: 1)Your CICS region is connected to MQ and tasks are succesfully making MQ calls. 2)You successfully disconnect CICS from MQ. 3)You successfully re-connect to MQ but now every request to MQ results in DFHMQ0480 . This problem happens when the following happens while CICS is connected to MQ. 1)A task makes a call to MQ and then that task ends. The L8 TCB used by that task is now free for other tasks to use. 2)A new task allocates that same L8 TCB for linking to an OpenAPI program. This new task does not make any MQ calls, and this new task never ends. 3)While that new task never ends, CICS disconnects from MQ and reconnects to MQ. . For MQ to completely be done with the prior connection, MQ needs for the TCBs that have Identified to MQ to end. But since that L8 TCB is allocated to a never-ending task, it doesn't end. This causes MQ to fail each request from this CICS region with MQRC MQRI_COORD_HAS_TERMINATED (8503). However this return code is overlayed with 2195 prior to CICS taking the DFHMQ0480 dump. CICS should put the original MQ reason code in the message or at least save the original MQ reason code somewhere before taking the dump. Additional Symptom(s) Search Keyword(s): KIXREVDWZ
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: DFHMQ0480 with MQCC=2 and MQRC=2195 * * received on all requests to WMQ after * * disconnecting then reconnecting to WMQ. * **************************************************************** * RECOMMENDATION: * **************************************************************** CICS is connected to IBM WebSphere MQ and an instance of CKTI (the CICS-WMQ trigger monitor or task initiator) is started. However the initiation queue specified is invalid. As a result CKTI issues messages DFHMQ0101 and DFHMQ0110, and then terminates. Later CICS is disconnected from WMQ, which attempts to detach from all TCBs which have performed WMQ work. The TCB which was earlier used to run the CKTI task is now being used by a long running task elsewhere in CICS. As a consequence the CICS-WMQ connection does not close. Any subsequent WMQ requests will fail with message DFHMQ0480. Keywords: msgDFHMQ0480 MQRC_UNEXPECTED_ERRORMQINI INITQ msgDFHMQ0101 MSGDFHMQ0110
Problem conclusion
DFHMQTSK has been modified such that after a failed attempt to open the WMQ initiation queue, the TCB that the CKTI task is running under is freed on task termination. As a result the TCB cannot be used by another task and therefore the CICS-WMQ connection can close.
Temporary fix
********* * HIPER * ********* FIX AVAILABLE BY PTF ONLY
Comments
APAR Information
APAR number
PM96275
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt
Submitted date
2013-09-03
Closed date
2013-09-16
Last modified date
2015-03-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK97725
Modules/Macros
DFHMQTSK
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R800 PSY UK97725
UP13/09/28 P F309
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.
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.1","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.1","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
04 March 2015