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https://issues.apache.org/jira/browse/MNG-6911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17113498#comment-17113498
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Mickael Istria commented on MNG-6911:
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I think one possible strategy is for the global cache to keep the reference to
pom file and its "lastModifiedTimestamp" of the pom file when parsing it, and
verify that the actual underlying file didn't change before returning it, or
just discard the if some change happened..
> Allow the Maven model cache tto recache a maven model on request
> ----------------------------------------------------------------
>
> Key: MNG-6911
> URL: https://issues.apache.org/jira/browse/MNG-6911
> Project: Maven
> Issue Type: Bug
> Components: IDEs, POM
> Affects Versions: 3.6.3
> Environment: Linux (Fedora 30-32)
> Reporter: Andrew Obuchowicz
> Priority: Major
>
> Hi, I'm one of the developers of
> [LemMinX-Maven|[https://github.com/eclipse/lemminx-maven]|https://github.com/eclipse/lemminx-maven],]
> which is a project that implements the Language Server Protocol for editing
> Maven pom.xml files (any LSP client editor can easily gain pom.xml editing
> features with this project).
>
> We've encountered an
> [issue|[https://github.com/eclipse/lemminx-maven/pull/67]] where
> modifications to a parent pom (such as adding a new property) are not
> reflected in the child pom, as the global model cache has an outdated version
> of the parent pom (before the modification was made).
>
> Disabling the global model cache works as a temporary workaround, eg.
>
> {code:java}
> System.setProperty(DefaultProjectBuilder.DISABLE_GLOBAL_MODEL_CACHE_SYSTEM_PROPERTY,
> Boolean.toString(true));
> {code}
>
> However, we'd still like to use the model cache and not have to disable it
> entirely.
>
> Thus, it would be beneficial if the model cache could "uncache" (or refresh)
> a pom that has been modified. From our project, we can easily detect when a
> pom.xml has been modified, thus tracking pom modifications does not need to
> be implemented. *What is required on the Maven API side* is to be able to
> signal that a pom.xml has been modified, and should be recached with the new
> modifications.
>
> Also, I apologize in advance if this was reported under the wrong project or
> component. Feel free to place it where it should be.
>
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