Stephan Ewen created FLINK-5218:

             Summary: Eagerly close checkpoint streams on cancellation
                 Key: FLINK-5218
             Project: Flink
          Issue Type: Bug
          Components: State Backends, Checkpointing
    Affects Versions: 1.1.3
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
            Priority: Critical
             Fix For: 1.2.0, 1.1.4

Some output streams perform blocking operations that cannot be properly 
interrupted. This causes cancellations to take very long when happening 
concurrently to large synchronous state snapshot operations.

Closing the streams concurrently helps to abort these blocking operations.

This might already be fixed in 1.2 by the {{CloseableRegistry}}.

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