[Commented] (MNG-6456) Log $JAVA_HOME when there is an issue with it

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[Commented] (MNG-6456) Log $JAVA_HOME when there is an issue with it

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    [ https://issues.apache.org/jira/browse/MNG-6456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16646285#comment-16646285 ]

Johanneke Lamberink commented on MNG-6456:

An echo of $JAVA_HOME would be enough, but that is only done when JAVA_HOME was successfully found and Maven proceeds with the issued command.

But if there is an issue with finding $JAVA_HOME, you don't get any feedback on which directory was used for checking.

> Log $JAVA_HOME when there is an issue with it
> ---------------------------------------------
>                 Key: MNG-6456
>                 URL: https://issues.apache.org/jira/browse/MNG-6456
>             Project: Maven
>          Issue Type: Improvement
>          Components: Command Line
>    Affects Versions: 3.5.4
>            Reporter: Johanneke Lamberink
>            Assignee: Michael Osipov
>            Priority: Minor
>             Fix For: waiting-for-feedback
> I've just spend more time than was necessary on debugging a problem where Maven complained about a missing $JAVA_HOME, because there was no logging of which $JAVA_HOME was used.
> It would be really helpful to be able to see the $JAVA_HOME being used by Maven, in addition to the current logging:
> {noformat}
> The JAVA_HOME environment variable is not defined correctly
> This environment variable is needed to run this program
> NB: JAVA_HOME should point to a JDK not a JRE{noformat}

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