A fix is available
APAR status
Closed as program error.
Error description
Hursley finds that (during a backout request for GET) issued by CSQ3RRSM an execution unit switch abended due to EBSuspRob being set. The intention of this APAR is to investigate whether a defect may be present to cause an issue during the execution unit switch.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM MQ for z/OS Version 9 * * Release 1 Modification 0 and * * Release 2 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Abend 5C6-00E50076 occurs in CSQVEUS1 * * following the unexpected memory * * termination (MEMTERM) of an RRS * * application. * **************************************************************** An RRS application switched to an RRS context and making an MQI call was forced/memterm'd. At the time the application was memterm'd a latch was held by the TCB performing work under the context, and due to the memterm no recovery processing could take place and the queue manager was terminated abnormally 6C6 with REASON=00F3040A. While the queue manager was still terminating, RRS called the CTX_END_CONTEXT_EXIT for the context. CSQ3RRSX/CSQ3RRSM switched to the context ACE and attempted to back out the UR, however as the context ACE had been left in an inconsistent state this resulted in the reported abend.
Problem conclusion
CSQ3RRSX has been changed to detect if the context ACE may have been left in an inconsistent state following MEMTERM processing, preventing the 5C6-00E50076 occurring during the expected abnormal termination of the queue manager.
Temporary fix
Comments
APAR Information
APAR number
PH36954
Reported component name
IBM MQ Z/OS V9
Reported component ID
5655MQ900
Reported release
100
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-05-05
Closed date
2022-01-04
Last modified date
2022-03-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI78787 UI78788
Modules/Macros
CSQ3RRSX CSQARIB
Fix information
Fixed component name
IBM MQ Z/OS V9
Fixed component ID
5655MQ900
Applicable component levels
Fix is available
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Document Information
Modified date:
02 March 2022