[
https://jira.codehaus.org/browse/MNG-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=345669#comment-345669
]
Michael Osipov commented on MNG-5626:
-------------------------------------
bq. IMHO I'd like the negative durations displayed with a minus sign, plus
maybe a warning with explanations on the log. It's just about printing a minus
sign and multiplying the duration with -1 if it's negative.
I do not think that this is that easy.
1. Just because the duration is negative we cannot assume that it is the same
as the absolute value of the actual build time.
2. That negative time has been subtracted from the grant total session build
time, so that value is broken. See your example.
I would try to fix what [~hboutemy] proposes with a snapshot and then we will
see whether it works or not.
> Avoid negative durations or handle them correctly
> -------------------------------------------------
>
> Key: MNG-5626
> URL: https://jira.codehaus.org/browse/MNG-5626
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Logging
> Affects Versions: 3.2.1
> Reporter: Christian Jung
> Priority: Minor
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.1.6#6162)
