APAR status
Closed as program error.
Error description
The queue manager ends unexpectedly. The issue is recorded in FDC records with probe XC130003 xehExceptionHandler. The call stack includes apiCheckpointMemoryObjects and mqlWriteLogRecord. The process is amqzmuc0. Probe Id :- XC130003 Component :- xehExceptionHandler Program Name :- amqzmuc0 Arith1 :- 11 (0xb) Comment1 :- SIGSEGV: address not mapped((nil)) MQM Function Stack zmuThreadMain zmuCheckpointTask alsCheckPointLoop aocPerformCheckpoint apiCheckpointMemoryObjects almLogIt hlgWriteLogRecord mqlWriteLogRecord xcsFFST
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Queue managers that are members of a cluster. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: The queue manager's checkpoint code writes data to the queue manager's logs, including some MQ internal data relating to the cluster transmission queue(s) in use for each cluster channel. In this case some data that was logically "deleted" was being written to the logs, but should not have been. Because of a code error, a null pointer was used and this resulted in a memory exception and the ending of the amqzmuc0 process which contains crucial queue manager internal operations. The queue manager then ended immediately because of this.
Problem conclusion
The MQ code has been corrected so that logically "deleted" objects are not written to the logs during checkpoint processing. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.5 7.5.0.8 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT18666
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7241
Reported release
750
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-01-05
Closed date
2017-04-20
Last modified date
2017-12-04
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
WMQ BASE MULTIP
Fixed component ID
5724H7241
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDEZSF","label":"IBM WebSphere MQ Managed File Transfer for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
31 March 2023