klion26 opened a new pull request #6777: [FLINK-10461] [State Backends, Checkpointing] Speed up download files when restore from DFS URL: https://github.com/apache/flink/pull/6777 ## What is the purpose of the change This PR speed up the download files when restore from DFS using multi-thread. ## Brief change log Use multi-thread from download files when restore from DFS. ## Verifying this change Add a UT for test exception rethrow in thread pool ## 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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