Fixes are available
APAR status
Closed as program error.
Error description
When a CLOSE message is overtaken by a CPU DOWN message the cleanup done as a reaction to the CLOSE will fail since the data it tries to access is not valid anymore, resulting in error 4022 when trying to lock a mutex. When a CPU fails that contains MQ queue manager processes, internal connections to those processes, are not properly released and cleaned up. Other MQ processes suffer errors performing Guardian process I/O. FDC shows- Probe Id :- ZC064002 Component :- zcgProcessCloseIPC Major Errorcode :- xecF_E_UNEXPECTED_SYSTEM_RC Probe Description :- AMQ6119: An internal WebSphere MQ error has occurred ('4022 - Invalid function argument' from pthread_mutex_lock.) Arith1 :- 4022 fb6 Comment1 :- '4022 - Invalid function argument' from pthread_mutex_lock.
Local fix
Problem summary
When a CPU fails that contains MQ queue manager processes, internal connections to those processes, are not properly released and cleaned up. Other MQ processes suffer errors performing Guardian process I/O and emit FFST's.
Problem conclusion
The IPCC component within MQ that manages communications between MQ processes has been revised to properly cleanup internal connections to missing processes, which allows them to handle and report the condition gracefully.
Temporary fix
Comments
APAR Information
APAR number
IT25677
Reported component name
WEBS MQ NSS ITA
Reported component ID
5724A3902
Reported release
531
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-07-12
Closed date
2018-07-13
Last modified date
2018-07-13
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
WEBS MQ NSS ITA
Fixed component ID
5724A3902
Applicable component levels
R531 PSY
UP
[{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.3.1"}]
Document Information
Modified date:
28 September 2021