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https://issues.apache.org/jira/browse/MNG-5227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17721711#comment-17721711
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Stamatis Zampetakis commented on MNG-5227:
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I hit this problem today in the Apache Hive project. To avoid licensing
problems we declared all JDBC driver dependencies as _runtime_ and _optional_
in the dependencyManagement section
([https://github.com/apache/hive/blob/47c784b46a951d4ee9ce2712f62aa6af92b71395/pom.xml#L1336)].
It took me a while to understand that actually the optional declaration in
dependencyManagement is ignored cause for some reason the maven dependency
plugin was showing that the dependency is optional when running the
{{dependency:tree}}.
Contrary to what others may think I would argue that this is a bug not a new
feature. If _optional_ is the only thing that is not handled in the
{{dependencyManagement}} section then this is quite unexpected. I think it
definitely deserves a mention in the
[documentation|https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Dependency_Management]
till this issue is fixed.
Are there any plans to include this in the next 4 release? Can I help with
something to move this forward.
> The 'optional' flag of a dependency should be manageable.
> ---------------------------------------------------------
>
> Key: MNG-5227
> URL: https://issues.apache.org/jira/browse/MNG-5227
> Project: Maven
> Issue Type: New Feature
> Components: Artifacts and Repositories
> Affects Versions: 3.0.3
> Reporter: Christian Schulte
> Priority: Minor
> Fix For: 4.0.x-candidate
>
> Attachments: MNG-5227.patch, MNG-5227.patch
>
>
> {code}
> <dependencyManagement>
> <dependencies>
> <dependency>
> <groupId>groupId</groupId>
> <artifactId>artifactId</artifactId>
> <version>version</version>
> <optional>false</optional> <!-- Ignored by Maven 2 & 3 in dependency
> management. -->
> </dependency>
> </dependencies>
> </dependencyManagement>
> {code}
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