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https://issues.apache.org/jira/browse/MNG-6315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16314932#comment-16314932
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Karl Heinz Marbaise commented on MNG-6315:
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First are you using the most recent version of Maven 3.5.2 ? Furthermore are
you using the most recent version of versions-maven-plugin (2.5) ? Can you add
a log output which shows the problem.. ?
Apart from that the [documentation of versions-maven-plugin
states|http://www.mojohaus.org/versions-maven-plugin/usage.html] explicitly
{{..you need to run these goals separately from any other goals or life-cycle
phases.}}.
> NPE in MultiThreadedBuilder
> ---------------------------
>
> Key: MNG-6315
> URL: https://issues.apache.org/jira/browse/MNG-6315
> Project: Maven
> Issue Type: Bug
> Components: core
> Reporter: David Hoover
>
> This smells similar to MNG-6170
> To reproduce, clone https://github.com/prestodb/presto (I've tested, in
> particular, at c0186a71815be31bac80253827e62c16fd04069f) and try to 'mvn -X
> -e versions:set versions:commit -DnewVersion=asdf'
> That NPEs on
> https://github.com/apache/maven/blob/master/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/MultiThreadedBuilder.java#L200
> (projectBuild.getProject() has already been called up at
> https://github.com/apache/maven/blob/master/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/MultiThreadedBuilder.java#L129
> so presumably it's that lifecycleModuleBuilder is null?)
> Running as two separate actions ("mvn versions:set" and then "mvn
> versions:commit") works for me, but not when combined.
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