liupc commented on issue #23842: [SPARK-26927]Fix race condition may cause dynamic allocation not working URL: https://github.com/apache/spark/pull/23842#issuecomment-469239271 > But it may be still possible that removedExecutorIds to be full due to plenty of TaskStartEvents blocked for a long long time theoretically. If it really happens, I'd choose to fail the entire ExecutorAllocationManager immediately @Ngone51 Good idea, but I think we can just drop these events and print some logging if the `removedExecutorIds` to be full due to plenty of TaskStartEvents blocked for a long long time, because it's even worse by failing the application. Actually, The events may be dropped in the `executorManagement` queue, and cause some unexpected behavior, and we now let it go and print some warning logs. I think we can do the similar ops for this case.
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