NicoK opened a new pull request #6693: [FLINK-10332][network] move data notification out of the synchronized block URL: https://github.com/apache/flink/pull/6693 ## What is the purpose of the change Currently, calls to `PipelinedSubpartition#notifyDataAvailable()` are unnecessarily executed inside a synchronized (buffers) block which may lead to lock contention which this PR fixes. Please note, that we build upon #6692. ## Brief change log - move data notification out of the synchronized block ## Verifying this change This change is already covered by existing tests. ## 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): **yes** (depending on output flusher interval, rather per buffer) - 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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