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https://issues.apache.org/jira/browse/MRESOLVER-250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tamás Cservenák resolved MRESOLVER-250.
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Resolution: Fixed
> Usage of descriptors map in DataPool prevents gargabe collection
> ----------------------------------------------------------------
>
> Key: MRESOLVER-250
> URL: https://issues.apache.org/jira/browse/MRESOLVER-250
> Project: Maven Resolver
> Issue Type: Bug
> Components: Resolver
> Affects Versions: 1.6.3
> Environment: Linux, Java 11
> Reporter: Frank Upgang
> Assignee: Tamás Cservenák
> Priority: Major
> Fix For: 1.8.0
>
> Attachments: image-2022-04-12-16-36-19-783.png,
> image-2022-04-12-16-36-49-903.png, image-2022-04-13-12-35-15-582.png
>
>
> While resolving a lot of rather huge dependency trees in my application I
> observed a high heap consumption by
> {_}org.eclipse.aether.internal.impl.collect.DataPool{_}.
> The _DataPool_ holds _Descriptor_ references in a {_}WeakHashMap{_}.
> Unfortunately, the key is indirectly referenced by the value - thus is is
> never eligible for garbage collection.
> The key is _an Artifact_ taken from the {_}ArtifactDescriptorRequest{_}.
> The value is an _ArtifactDescriptorResult_ which references the _Artifact_
> (key) and the {_}ArtifactDescriptorRequest{_}.
> To fix this the value should be wrapped in a _WeakReference_ or
> {_}SoftReference{_}.
> This is what the _ObjectPools_ does which is used by the _DataPool_ for
> _Artifacts_ and {_}Dependencies{_}.
>
> My use case is an application that indexes the dependency trees of all our
> services. Therefore there is a lot of dependency resolution when building the
> index.
> I implemented a workaround by wrapping the value in a WeakReference. The
> memory consumption is significantly lower afterwards as shown by the attached
> screenshots.
>
> If desired, I would create a pull request, but I haven't set up a maven
> workspace yet.
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