APAR status
Closed as program error.
Error description
In a system using NTP synchronization, the queue manager might return a large positive for AverageQueueTime. Output from amqsmon: AverageQueueTime: [174025887487825958, 0] Other affected attributes: TimeOnQAvg TimeOnQMax TimeOnQMin This problem likely to occur when there is a backward time shift in the system time because of NTP synchronization.
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users using accounting and statistics will be affected by this problem. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: When there was a backward time shift MQ then value calculated for AverageQueueTime could result in negative delta and after conversion to unsigned the value might become a large positive value. The statistics code did not correctly account for this possibility.
Problem conclusion
MQ accounting and statistics code has been modified to set the AverageQueueTime to Maximum if there is a negative time shift. The APAR IT13006 fixed similar problem for earlier releases in the past. The APAR added some additional changes to adjust the AverageQueueTime if there is a negative timeshift. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.0 LTS 9.0.0.9 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
IT30371
Reported component name
IBM MQ BASE M/P
Reported component ID
5724H7261
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-09-24
Closed date
2019-10-28
Last modified date
2019-10-28
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 M/P
Fixed component ID
5724H7261
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":"9.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
28 October 2019