azagrebin commented on issue #6777: [FLINK-10461] [State Backends, Checkpointing] Speed up download files when restore from DFS URL: https://github.com/apache/flink/pull/6777#issuecomment-446148631 @klion26 right, sorry for confusion. I think we should move `DirectExecutorService` into `org.apache.flink.runtime.concurrent`. We have already there `Executors.directExecutor()`. This could be deduplicated. `directExecutor()` could become `directExecutorService()` and return `DirectExecutorService` singleton as `ExecutorService` instead of `Executor`. Then `DirectExecutor` is not needed in `Executors`. Could you do it as a separate commit?
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