Tom-Goong opened a new pull request #7947: [FLINK-11867][Build System]Mistaking in checking filePath's value URL: https://github.com/apache/flink/pull/7947 ## What is the purpose of the change ` Preconditions.checkNotNull(filePath, "The file path must not be null."); Preconditions.checkNotNull(filePath.isEmpty(), "The file path must not be empty.");` The second line of code has no effect ## Brief change log * Changing the to check the filePath's value and the hint ## 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**, restore state when failover using RestartPipelinedRegionStrategy. * The S3 file system connector: **no** ## Documentation * Does this pull request introduce a new feature? **no**
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