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https://issues.apache.org/jira/browse/MNG-5965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16729590#comment-16729590
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Michael Osipov edited comment on MNG-5965 at 12/27/18 1:17 PM:
---------------------------------------------------------------

Fixed with 
[c6bdafed23f152d83d766c1ed3db8c1c4b723eb3|https://gitbox.apache.org/repos/asf?p=maven.git;a=commit;h=c6bdafed23f152d83d766c1ed3db8c1c4b723eb3]
 and 
[d3d6ea3a6345a51a08e8dd41a0254e8cb0f2692f|https://gitbox.apache.org/repos/asf?p=maven-integration-testing.git;a=commit;h=d3d6ea3a6345a51a08e8dd41a0254e8cb0f2692f]..


was (Author: michael-o):
Fixed with 
[c6bdafed23f152d83d766c1ed3db8c1c4b723eb3|https://gitbox.apache.org/repos/asf?p=maven.git;a=commit;h=c6bdafed23f152d83d766c1ed3db8c1c4b723eb3].

> Parallel build multiplies work if multiple goals are given
> ----------------------------------------------------------
>
>                 Key: MNG-5965
>                 URL: https://issues.apache.org/jira/browse/MNG-5965
>             Project: Maven
>          Issue Type: Bug
>          Components: Bootstrap & Build
>    Affects Versions: 3.3.9
>         Environment: Windows 7 64bit
>            Reporter: Matthias Schmalz
>            Assignee: Michael Osipov
>            Priority: Major
>             Fix For: 3.6.1
>
>         Attachments: parallel.test.zip
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> When I run a parallel build which invokes multiple goals Maven multiplies the 
> work e.g. when I run
> install sonar:sonar
> Every phase is executed once as expected. However when I run
> install sonar:sonar -T 4
> Every phase is executed twice.
> The problem can be reproduced with a single simple Java project (of course 
> parallel builds are useless with a single module). Debugging showed that 
> every Mojo is really called twice per project.
> Find attached a simple project and two build outputs, where you can see that 
> the parallel build is doing everything twice (you can ignore that Sonar fails 
> in the end, due to no server is up).



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