AHeise removed a comment on issue #10682: [FLINK-15247][Runtime] Wait for all slots to be free before task executor services shutdown upon stopping URL: https://github.com/apache/flink/pull/10682#issuecomment-576580269 > I think the safest way to handle timer service concurrency issues is to schedule its stopping to the main thread of task executor. Then there is only a thread-confined access to its internal container for registered callbacks. Would be awesome if you could use that and simplify the threading model. Let me know if you need any pointer.
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