A fix is available
APAR status
Closed as program error.
Error description
Client received a SOC4 ABEND in mod CSQ3RRSM, this is a timing issue when an ASID is going through termination processing at the same time as a new connection is performing an RRS attach to the same address space.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 0 Modification 0, Release 1 * * Modification 0 and Release 2 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Abend 0C4 occurs in CSQ3RRSM, * * accompanied by error message * * CSQ3009E when using DB2 stored * * procedures linked with CSQBSTUB. * **************************************************************** MQ's RRS exit CSQ3RRSX was invoked (e.g for PREPARE) by DB2 acting as an SDSRM, and called CSQ3RRSM. This located an existing ASCE for the DB2 WLM managed stored procedure address space, and began establishing the necessary environment to process the indicated function. At the same time a running stored procedure issued MQDISC, and as it was the last task in the address space with an active connection to the queue manager, this cleaned up MQ resources associated with the connection, including the ASCE. This resulted in the reported abend 0C4 when CSQ3RRSM attempted to reference a field in the now freed ASCE.
Problem conclusion
The queue manager will now defer cleaning up the ASCE for a DB2 WLM managed stored procedure address space until the address space terminates, preventing the ASCE being freed while still in use by the RRS exits.
Temporary fix
Comments
APAR Information
APAR number
PH32885
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-12-21
Closed date
2021-04-27
Last modified date
2021-06-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI75111 UI75112 UI75113
Modules/Macros
CSQ3AMT3 CSQ3ID80 CSQ3RRSM CSQ3SSI2 CSQYALLI
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
R000 PSY UI75113
UP21/05/29 P F105 ¢
R100 PSY UI75112
UP21/05/29 P F105 ¢
R200 PSY UI75111
UP21/05/29 P F105 ¢
Fix is available
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Document Information
Modified date:
03 June 2021