APAR status
Closed as program error.
Error description
If the queue manager is configured to suppress messages in the error log file and if the qm.ini SuppressMessage property contains a message ID, then the amqzmur0 and/or amqzmuc0 processes consume high CPU. Here is an example of setting the qm.ini file which triggers high CPU: QMErrorLog: SuppressMessage=9202 SuppressInterval=30
Local fix
To prevent high CPU usage, remove the SuppressMessage property from the qm.ini QMErrorLog stanza.
Problem summary
**************************************************************** USERS AFFECTED: Users of the SuppressMessage qm.ini stanza may be affected by this problem. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: A logic error meant that a tight loop occured when the SuppressInterval expires and there are outstanding messages matching the SuppressMessage configuration.
Problem conclusion
The code was modified so that any suppressed messages are processed once the expiry defined by SuppressInterval is reached. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.1 CD 9.1.5 v9.1 LTS 9.1.0.4 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
IT29480
Reported component name
IBM MQ BASE MP
Reported component ID
5724H7271
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-06-18
Closed date
2019-10-25
Last modified date
2019-10-25
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
IBM MQ BASE MP
Fixed component ID
5724H7271
Applicable component levels
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
25 October 2019