[GitHub] [flink] zhijiangW commented on issue #8557: [FLINK-12544][network] Fix the deadlock while releasing memory triggered by multiple threads in SpillableSubpartition

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zhijiangW commented on issue #8557: [FLINK-12544][network] Fix the deadlock while releasing memory triggered by multiple threads in SpillableSubpartition
URL: https://github.com/apache/flink/pull/8557#issuecomment-496467258
 
 
   @pnowojski , I thought of two ways for solving the deadlock issue:
   
   - One is making `owner.get().releaseMemory(1)` outside of `synchronized` in `LocalBufferPool#requestMemorySegment`. 
   
   - Another is making the logic of `bufferConsumer.close()` during `SpillableSubpartition#spillFinishedBufferConsumers` outside of `synchronized`.
   
   I take the first option in this PR and it seems more easier for fixing.
   

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