[jira] [Commented] (FLINK-9598) [Checkpoints] The config Minimum Pause Between Checkpoints doesn't work when there's a checkpoint failure

["Yun Tang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16545318#comment-16545318 ] 

Yun Tang commented on FLINK-9598:
---------------------------------

Hi [~premsantosh], the "Minimum Pause Between Checkpoints" is actually the initial delay between successful checkpoints, you can find the logical in CheckpointCoordinator#_triggerCheckpoint_() method, in which after expired-checkpoint cleaner detects some checkpoint expired, it will trigger another checkpoint ASAP through CheckpointCoordinator#_triggerQueuedRequests_() method, no matter Flink-1.3.2 or latest Flink-1.5.1

I think a user usually wants to get a successful checkpoint as quickly as possible again, and the running checkpoint would not stall your application running in general as the sub-tasks only start snapshot when checkpoint barrier comes, not all sub-tasks are executing snapshot process.

In my point of view, it would be better to redefine some of the javadocs e.g. attribute _minPauseBetweenCheckpointsNanos_ in CheckpointCoordinator. What's your opinion [~yanghua], if you don't have time to do these trivial works, I'd like to take some time to redefine all related javadocs.

> [Checkpoints] The config Minimum Pause Between Checkpoints doesn't work when there's a checkpoint failure
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-9598
>                 URL: https://issues.apache.org/jira/browse/FLINK-9598
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 1.3.2
>            Reporter: Prem Santosh
>            Assignee: vinoyang
>            Priority: Major
>         Attachments: Screen Shot 2018-06-20 at 7.44.10 AM.png
>
>
> We have set the config Minimum Pause Between Checkpoints to be 10 min but noticed that when a checkpoint fails (because it timesout before it completes) the application immediately starts taking the next checkpoint. This basically stalls the application's progress since its always taking checkpoints.
> [^Screen Shot 2018-06-20 at 7.44.10 AM.png] is a screenshot of this issue.
> Details:
>  * Running Flink-1.3.2 on EMR
>  * checkpoint timeout duration: 40 min
>  * minimum pause between checkpoints: 10 min
> There is also a [relevant thread|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Having-a-backoff-while-experiencing-checkpointing-failures-td20618.html] that I found on the Flink users group.
>  



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