Github user brkyvz commented on the issue: https://github.com/apache/spark/pull/17308 @ScrapCodes It should have a `clear` method for testing. We won't be able to guarantee shutdown being called on the executors when the `stop` method for the Sink is called anyway, that's why I suggested the timeout solution. If you really want, I think you can also use the `ShutdownHookManager` and call clean on the cache as well.
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