azagrebin opened a new pull request #9997: [FLINK-14522] Introduce JavaGcCleanerWrapper to find Java GC Cleaner depending on JVM version URL: https://github.com/apache/flink/pull/9997 ## What is the purpose of the change sun.misc.Cleaner is not available since Java 9. It was moved to jdk.internal.ref.Cleaner of java.base module (Open JDK-8148117), but another new public API was introduced to achieve the same behaviour (java.lang.ref.Cleaner); A popular solution is use reflection to look up for the location of the Cleaner class depending on running JVM version. ## Brief change log - Introduce JavaGcCleanerWrapper which uses reflection to look up and provide proper Cleaner implementation depending on JVM version on runtime - Introduce JavaGcCleanerWrapperTest to test that the clean method is called ## Verifying this change Run JavaGcCleanerWrapperTest ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (not applicable)
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