tillrohrmann opened a new pull request #6821: [FLINK-10524] Retry MemoryManager#release if NoSuchElementException URL: https://github.com/apache/flink/pull/6821 ## What is the purpose of the change The MemoryManager#release method retries in case of ConcurrentModificationExceptions because memory can be released concurrently. In case of concurrent releases we can also see a NoSuchElementException if we are in the ArrayList.Itr#next call past the concurrent modification check and try to access, for example, an index which is exceeding the ArrayList's size. Thus, we should also retry on seeing a NoSuchElementException because it indicates a concurrent modification. ## Verifying this change - Covered by `MemoryManagerConcurrentModReleaseTest.testConcurrentModificationWhileReleasing` ## 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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