A fix is available
APAR status
Closed as program error.
Error description
An application creates shared dynamic queues and puts messages. After the messages are read, the queues are deleted. Intermittently, one or more abends occur: ABN=5C6-00C90C00,LOC=CSQILPLM.CSQIDGET ABN=5C6-00D40017,LOC=CSQMLPLM.CSQMOPNI ABN=5C6-00D40017,LOC=CSQMLPLM.CSQMCLS2 The problem is a timing issue in the processing in two queue managers in the Queue Sharing Group (QSG). On one queue manager, an application is opening a new permanent dynamic shared queue, and the thread is in the process of creating the Coupling Facility (CF) list header entry for the queue. On another member of the QSG, the CF structure is being opened for the first time since the queue manager started, and the queue manager is attempting to resynchronise the contents of the CF structure with the in-storage queue objects and the contents of DB2. The timing issue leads to the abend. Additional Symptom(s) Search Keyword(s): ABEND5C6 ABENDS5C6 5C6 S5C6 S05C6
Local fix
N/A
Problem summary
**************************************************************** * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 * * Release 0 Modification 0. * **************************************************************** * PROBLEM DESCRIPTION: Creation and deletion of shared dynamic * * queues can lead to various abends when * * one qmgr is resynchronising, e.g: * * Abend 5C6-00D40017 in CSQMOPNI, * * Abend 5C6-00C90C00 in CSQIDGET, * * Abend 5C6-00D40017 in CSQMCLS2 * **************************************************************** * RECOMMENDATION: * **************************************************************** One queue manager in a Queue Sharing Group (QSG) creates a new shared dynamic queue. At the point at which it has created the CF list header entry, another qmgr, resynchronising DB2 and CF structure contents, deletes the newly created LHQC since it was originally marked for deletion and has the same list header number. When the first qmgr tries to update the new queue, the LHQC has now been deleted from the CF structure. The update fails and the 5C6 abends occur.
Problem conclusion
The fixed code no longer deletes the LHQC during resynchronisation. 000Y CSQEDB2R
Temporary fix
Comments
APAR Information
APAR number
PI45438
Reported component name
WMQ Z/OS 8
Reported component ID
5655W9700
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-07-22
Closed date
2015-08-14
Last modified date
2015-10-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI30224
Modules/Macros
CSQEDB2R
Fix information
Fixed component name
WMQ Z/OS 8
Fixed component ID
5655W9700
Applicable component levels
R000 PSY UI30224
UP15/09/09 P F509
Fix is available
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Document Information
Modified date:
02 October 2015