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Posted to issues@flink.apache.org by "Piotr Nowojski (JIRA)" <ji...@apache.org> on 2019/05/23 11:58:00 UTC
[jira] [Commented] (FLINK-12536) Make
BufferOrEventSequence#getNext() non-blocking
[ https://issues.apache.org/jira/browse/FLINK-12536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16846665#comment-16846665 ]
Piotr Nowojski commented on FLINK-12536:
----------------------------------------
Thanks for showing an interest in this issue [~klion26]. Before implementing this, could you share in this ticket how would you like to implement it?
> 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
> Assignee: Congxian Qiu(klion26)
> Priority: Major
>
> 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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