[jira] [Commented] (FLINK-5960) Make CheckpointCoordinator less blocking

["ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-5960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16004100#comment-16004100 ] 

ramkrishna.s.vasudevan commented on FLINK-5960:
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I can work on this too, if no one else is already working on this.

> Make CheckpointCoordinator less blocking
> ----------------------------------------
>
>                 Key: FLINK-5960
>                 URL: https://issues.apache.org/jira/browse/FLINK-5960
>             Project: Flink
>          Issue Type: Improvement
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.2.0, 1.3.0
>            Reporter: Till Rohrmann
>
> Currently the {{CheckpointCoordinator}} locks its operation under a global lock. This also includes writing checkpoint data out to a state storage. If this operation blocks, then the whole checkpoint operator stands still. I think we should rework the {{CheckpointCoordinator}} to make fewer assumptions about external systems to tolerate write failures and timeouts. Furthermore, we should try to limit the scope of locking and the execution of potentially blocking operation under the lock. This will improve the runtime behaviour of the {{CheckpointCoordinator}}.



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