APAR status
Closed as program error.
Error description
In a system using NTP synchronization, amqsmon can occasionally display a large positive for AverageQueueTime when accounting or statistics is generated. Example: 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: The AverageQueueTime is calculated from QTimeTotal value set by the queue manager. When there is a backward time shift then QTimeTotal is set to maximum value for the datatype. However the AverageQueueTime did not follow this rule and the average was calculated from the max value set.
Problem conclusion
MQ accounting and statistics code has been modified to set the AverageQueueTime to Maximum if there is a negative time shift. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v8.0 8.0.0.6 v9.0 CD 9.0.1 v9.0 LTS 9.0.0.1 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
IT13006
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7251
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-01-04
Closed date
2016-08-25
Last modified date
2017-09-13
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
WMQ BASE MULTIP
Fixed component ID
5724H7251
Applicable component levels
R800 PSY
UP
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Document Information
Modified date:
13 September 2017