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https://issues.apache.org/jira/browse/MNG-7870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17762284#comment-17762284
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Herve Boutemy commented on MNG-7870:
------------------------------------

yes, probably a confusion about setting the data from maven-compat has been 
disabled, then for some Maven releases, data was not filled any more
that created some reports (MNG-7375) showing that the missing data was causing 
NPEs: at that time, we supposed that the data should just be ignored, and 
documentation updated about that expectation => mark deprecated

but later, MNG-7055 introduced a new way to fill the data (in Maven 3.9.0 and 
4) using Aether/Maven Resolver APIs instead of maven-compat

then yes, mistake in documentation to be solved and point to MNG-7055 on how 
disable maven-compat mechanism has been replaced in MNG-7055 Maven Resolver 
(ideally, MNG-7055 should point to the update in maven-compat that stopped 
filling the fields = the first Maven release that is broken regarding this 
field...)

> Undeprecate wrongly deprecated repository metadata
> --------------------------------------------------
>
>                 Key: MNG-7870
>                 URL: https://issues.apache.org/jira/browse/MNG-7870
>             Project: Maven
>          Issue Type: Task
>          Components: Artifacts and Repositories
>            Reporter: Tamas Cservenak
>            Priority: Major
>             Fix For: 4.0.0-alpha-8, 3.9.5
>
>
> In commit 
> https://github.com/apache/maven/commit/1af8513fa7512cf25022b249cae0f84062c5085b
>  related to MNG-7385 the modello G level metadata was deprecated (by mistake 
> I assume).
> Undo this.



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