Till Rohrmann created FLINK-17554:
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Summary: Add release hooks for user code class loader
Key: FLINK-17554
URL: https://issues.apache.org/jira/browse/FLINK-17554
Project: Flink
Issue Type: New Feature
Components: Runtime / Coordination
Affects Versions: 1.11.0
Reporter: Till Rohrmann
Assignee: Till Rohrmann
Fix For: 1.11.0
Release hooks for the user code class loader which are run just before the user
code class loader is released would allow clean up static references to classes
of the user code class loader. This is important because these static
references could prevent the user code classes from being garbage collected and
eventually causing metaspace OOMs.
Hence I suggest to extend the {{RuntimeContext}} with an additional method
{{registerUserCodeClassLoaderReleaseHook(Runnable releaseHook)}} which allows
the user code to register a release hook for the user code class loader.
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