TsReaper opened a new pull request #11688: [FLINK-16636] Fix possible NPE in Utils.CollectHelper URL: https://github.com/apache/flink/pull/11688 ## What is the purpose of the change This PR fixes the possible NPE when closing `Utils.CollectHelper`. When the sink is up but not initialized and the job fails due to other operators, it is possible that `close()` is called when `open()` is not called. Currently `Utils.CollectHelper` does not deal with this case. See [FLINK-16636](https://issues.apache.org/jira/browse/FLINK-16636) for more detailed discussion. ## Brief change log - Fix possible NPE in Utils.CollectHelper ## Verifying this change This change is a trivial rework / code cleanup without any test coverage. ## 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, Kubernetes/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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