A fix is available
APAR status
Closed as program error.
Error description
An abend 0C4-00000004 -CSQMTPUT, M=CSQGFRCV, LOC=CSQMLPLM.CSQMTPUT was occurring because the QRPL_END_THREAD request was not being handled correctly by Omegamon for MQ). . In the dump that the MQ Change Team analyzed from the 0C4 in CSQMTPUT, this was occurring when CICS tran Y766 was trying to put to a topic object. The 0C4 occurs after CSQMTPUV has detected that the CICS transaction has previously reached commit phase 1, but the unit of work has not gone to phase 2 commit processing. The reason for this is that the CICS transaction issued a QRPL_PREPARE request followed by a QRPL_END_THREAD request, but the QRPL_END_THREAD request was passed to CSQMPRH2 for processing, which is incorrect so the request was rejected with MQRA_INVALID_QRPL_CMD. The QRPL_END_THREAD request should be processed by CSQMCETH. We could see that the customer was using Omegamon for MQ, and this intercepts requests between CSQMCPRH and CSQMPRH2. Therefore the problem here was that Omegamon was intercepting the QRPL_END_THREAD request, and was passing the request to CSQMPRH2 rather than CSQMCETH. . Additional Symptom(s) Search Keyword(s): ABEND0C4 ABENDS0C4 S0C4 S00C4 . +DFHMQ0480 E 03/19/2017 20:56:34 CICSPAOR MQCC=2 MQRC=2195 QRPL at X'1BF4B2B0' FRB at X'1B0B4EF0'.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All users of IBM MQ for z/OS Version 9 Release 0 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: * * Abend S0C4 may occur when putting a message to a topic and * * internal validation of the put request fails. * **************************************************************** * RECOMMENDATION: * **************************************************************** If an internal error occurs during put validation of a message to a topic, then an S0C4 abend may occur when subsequent processing uses an uninitialized pointer to a control block.
Problem conclusion
Processing has been amended to ensure that the control block pointer is valid before using it.
Temporary fix
Comments
APAR Information
APAR number
PI81445
Reported component name
MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-05-11
Closed date
2017-05-25
Last modified date
2017-09-16
APAR is sysrouted FROM one or more of the following:
PI78593
APAR is sysrouted TO one or more of the following:
UI47578 PH50279
Modules/Macros
CSQMTPUT
Fix information
Fixed component name
MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R000 PSY UI47578
UP17/08/10 P F708
Fix is available
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Document Information
Modified date:
19 October 2022