A fix is available
APAR status
Closed as program error.
Error description
After RRS failure, ABEND0D6 occurs at CSQIRRSI which is trying to issue an Express_UR_Interest. The recovery processing does not undo the MQGET process, but it returns to the application with MQRC 2195. The application then issues commit which results in message lost. In this situation the message should have been backed out before returning the application with MQRC 2195.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 * * Release 0 Modification 1 and Release 1 * * Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: An underlying abend occurs during the * * get processing, such as, but not * * limited to, 0D6-00000027 (RRS abend), * * causing: * * a MQGET with MQGMO_LOCK for a shared * * queue to complete with MQRC 2195 * * (MQRC_UNEXPECTED_ERROR) and the message * * to be removed from the queue. * * a MQGET with MQGMO_SYNCPOINT for a * * locked message on a shared queue to * * complete with MQRC 2195 * * (MQRC_UNEXPECTED_ERROR) and the message * * to be removed from the queue. * **************************************************************** * RECOMMENDATION: * **************************************************************** An MQGET is being processed. As this is for a shared queue, the ETRQS and ETROP control blocks have been created. After the underlying abend occurred, the recovery processing that takes place in CSQIMGES does not undo the creation of the ETRQS and ETROP blocks, nor does it undo the destructive MQGET and put the message back into the browse locked state it was in before the destructive MQGET was issued. In the case of the browse locked message, the browse lock is not undone correctly, and the message remains unavailable to other getters.
Problem conclusion
The code has been changed to correctly undo the browse lock if an error occurs during the browse + lock operation. The code has been changed to correctly undo the destructive get and restore the browse lock if an error occurs during the MQGET of a browse locked message. 010Y 100Y CSQESYNC CSQESYN1 CSQIMGES
Temporary fix
********* * HIPER * *********
Comments
APAR Information
APAR number
PM92995
Reported component name
WMQ Z/OS V7
Reported component ID
5655R3600
Reported release
010
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2013-07-15
Closed date
2013-08-21
Last modified date
2013-10-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UK96902 UK96903
Modules/Macros
CSQESYNC CSQESYN1 CSQIMGES
Fix information
Fixed component name
WMQ Z/OS V7
Fixed component ID
5655R3600
Applicable component levels
Fix is available
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Document Information
Modified date:
04 October 2013