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https://issues.apache.org/jira/browse/MNG-7316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17433912#comment-17433912
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Michael Osipov commented on MNG-7316:
-------------------------------------
I see no reason to attach and detach an artifact just because you don't want to
upload to repository.a.o. I don't understand it. There is
https://maven.apache.org/plugins/maven-assembly-plugin/single-mojo.html#attach
and this should say {{false}} for your case. Regardless of this case, this is a
regression even if the previous behavior was undocumented. Making the
collection mutable again while retaining the fix completely defeats the actual
fix. After an internal discussion with @rfscholte we agreed to revert the fix
because it is an unwanted regression. The fix will remain for Maven 4, it won't
be addressed in Maven 3.x.
[~rfscholte], please leave your opinion too, if you like.
> MavenProject.getAttachedArtifacts() regression with 3.8.1
> ---------------------------------------------------------
>
> Key: MNG-7316
> URL: https://issues.apache.org/jira/browse/MNG-7316
> Project: Maven
> Issue Type: Bug
> Components: Core
> Affects Versions: 3.8.2, 3.8.3
> Reporter: Gary D. Gregory
> Priority: Critical
>
> The method {{MavenProject.getAttachedArtifacts()}} as of 3.8.2 breaks
> releasing components for us at Apache Commons using our Maven Release plugin
> because the list returned is now immutable, we now get an exception when
> calling {{remove()}} on the collection returned by the API; see
> [https://github.com/apache/commons-release-plugin/blob/master/src/main/java/org/apache/commons/release/plugin/mojos/CommonsDistributionDetachmentMojo.java#L137]
> This worked fine in 3.8.1, may you please change it back for 3.8.4?
> We cannot use Maven 3.8.2 and 3.8.3 to release our components.
> ([~michael-o]: Ironically, I discovered this trying to create a release
> candidate for Apache Commons CLI.)
> The exception in 3.8.3:
> {quote}Caused by: java.lang.UnsupportedOperationException
> at java.util.Collections$UnmodifiableCollection.remove
> (Collections.java:1060)
> at
> org.apache.commons.release.plugin.mojos.CommonsDistributionDetachmentMojo.execute
> (CommonsDistributionDetachmentMojo.java:136)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:137)
> {quote}
>
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