Stefan Oehme created MNG-6720:
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Summary: MultiThreadedBuilder does not wait for outstanding
projects to complete
Key: MNG-6720
URL: https://issues.apache.org/jira/browse/MNG-6720
Project: Maven
Issue Type: Bug
Components: core
Affects Versions: 3.6.1, 3.5.4
Reporter: Stefan Oehme
When a project fails using --fail-fast mode, other projects that are currently
running in parallel are not finished before the "session finished" event is
sent. This leads to issues for extensions that rely on the documented order of
events, which says that "session finished" is only sent "after all projects
have finished executing".
In our case, we close a service on "session finished", and that service is
needed to execute goals. The goals that were running in parallel at that time
then fail, saying that our service was closed, giving our users the impression
that there is a bug in our code.
The relevant line is
[here|[https://github.com/apache/maven/blob/master/maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/multithreaded/MultiThreadedBuilder.java#L179]].
Instead of using `poll`, which simply returns when the parallel projects
aren't finished yet, the code should shut down the executor and wait for it to
complete the outstanding parallel work.
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