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https://issues.apache.org/jira/browse/MNG-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17905025#comment-17905025
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Guillaume Nodet commented on MNG-5626:
--------------------------------------
It will be fixed as part of MNG-5729
> Avoid negative durations or handle them correctly
> -------------------------------------------------
>
> Key: MNG-5626
> URL: https://issues.apache.org/jira/browse/MNG-5626
> Project: Maven
> Issue Type: Bug
> Components: Logging
> Affects Versions: 3.2.1
> Reporter: Christian Jung
> Assignee: Guillaume Nodet
> Priority: Minor
> Fix For: 4.1.0
>
>
> In issue MNG-5623 we reported an exception when printing the reactor summary
> if one of the times was negative.
> I saw in one case, that the overall maven build time, as measured from
> outside (i.e. by our QuickBuild system) was -10.8 seconds. The corresponding
> reactor summary was:
> {code}
> 13:55:25,184 INFO - Reactor Summary:
> 13:55:25,184 INFO -
> 13:55:25,184 INFO - module1 ...........................................
> SUCCESS [ 5.911 s]
> 13:55:25,184 INFO - module2 ...........................................
> SUCCESS [ 0.255 s]
> 13:55:25,184 INFO - gpPlaygroundBase-lnx-x64-gcc4 .....................
> SUCCESS [-27.-64 s]
> 13:55:25,185 INFO -
> ------------------------------------------------------------------------
> 13:55:25,185 INFO - BUILD SUCCESS
> 13:55:25,185 INFO -
> ------------------------------------------------------------------------
> 13:55:25,185 INFO - Total time: -20.-73 s
> 13:55:25,185 INFO - Finished at: 2014-04-28T13:55:25+01:00
> 13:55:25,572 INFO - Final Memory: 32M/439M
> 13:55:25,572 INFO -
> ------------------------------------------------------------------------
> {code}
> The thing is quite hard to reproduce, the machines were virtual machines that
> have been running for quite a long time.
> Our administrators suspected that just at this point, the local clock was
> synchronized with some outer source.
> We should check if such negative durations can be avoided, and if not, they
> should be handled correctly.
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