A fix is available
APAR status
Closed as program error.
Error description
Ø ABEND0C4 in CMQXRLUF +03A5A occurs followed by messages in joblog; ie. +CSQX112E CSQXDISP Dispatcher process error, ,TCB=tcbaddr reason=0C4000-00000010 +CSQX599E CSQXRESP Channel channel_name ended abnormally +CSQX053E CSQXFFST Error information recorded in CSQSNAP data set The problem occurs when an XA CLOSE is received while the thread still has some queue handles open. In this situation, the handles are not closed, and when the thread control blocks (ACE) get reused it may try and post an ECB associated with the handle from the old thread.
Local fix
N/A
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version7 * * Release 1 Modification 0 * **************************************************************** * PROBLEM DESCRIPTION: Abend 0C4 in CMQXRLUF when an XA_CLOSE * * is issued for a thread which still has * * open handles. * **************************************************************** * RECOMMENDATION: * **************************************************************** Issuing an XA_CLOSE will no longer cause CSQVDLC to be invoked in order to deallocate the thread's resources in CSQMCPRH. Subsequently the ACE is put on the MCLB freechain ready to be reused. When the ACE gets reallocated CSQM1P1W might be issued to post its ECB, which will be associated with the old thread's handle. If the associated storage has been reused then various abends may occur.
Problem conclusion
CSQMCPRH has been changed to issue a CSQVDLC on the thread in response to an XA_CLOSE command, freeing up its resources. 100Y CSQMCPRH
Temporary fix
Comments
APAR Information
APAR number
PM75949
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2012-10-26
Closed date
2013-02-06
Last modified date
2013-03-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK91446
Modules/Macros
CSQMCPRH
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
R100 PSY UK91446
UP13/03/01 P F302
Fix is available
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Document Information
Modified date:
04 March 2013