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https://issues.apache.org/jira/browse/MNG-7556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17626113#comment-17626113
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Hudson commented on MNG-7556:
-----------------------------

Build succeeded in Jenkins: Maven » Maven TLP » maven » maven-3.9.x #77

See 
https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/maven-3.9.x/77/

> Clean up notion between user properties and system properties
> -------------------------------------------------------------
>
>                 Key: MNG-7556
>                 URL: https://issues.apache.org/jira/browse/MNG-7556
>             Project: Maven
>          Issue Type: Task
>            Reporter: Michael Osipov
>            Assignee: Michael Osipov
>            Priority: Major
>             Fix For: 3.9.0, 4.0.0, 4.0.0-alpha-3
>
>
> For a very long time we have documented that the user can set system 
> properties via {{mvn -Dfoo=bar}}, but actually those are user properties 
> which are promoted to system properties and it some cases system properties 
> cannot be modified *after* the JVM has been started. To properly set system 
> properties there are basically two ways:
> * use {{MAVEN_OPTS}} environment variable
> * use {{.mvn/jvm.config}} file
> A third option in the future we could introduce, like other Java tools, a 
> {{-J-Dfoo=bar}} option with the restriction of the the paragraph above.



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