[jira] [Created] (FLINK-12536) Make BufferOrEventSequence#getNext() non-blocking

[Shang Yuanchun (Jira)]

Piotr Nowojski created FLINK-12536:
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             Summary: Make BufferOrEventSequence#getNext() non-blocking
                 Key: FLINK-12536
                 URL: https://issues.apache.org/jira/browse/FLINK-12536
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Network
    Affects Versions: 1.9.0
            Reporter: Piotr Nowojski


Currently it is non-blocking in case of credit-based flow control (default), however for \{{SpilledBufferOrEventSequence}} it is blocking on reading from file. We might want to consider reimplementing it to be non blocking with {{CompletableFuture<?> isAvailable()}} method.

 

Otherwise we will block mailbox processing for the duration of reading from file - for example we will block processing time timers and potentially in the future network flushes.

 

This is not a high priority change, since it affects non-default configuration option AND at the moment only processing time timers are planned to be moved to the mailbox for 1.9.



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