[jira] [Assigned] (FLINK-21839) SinkFunction snapshotState don't snapshot all data when trigger a stop-with-drain savepoint

[Piotr Nowojski (Jira)]

     [ 
https://issues.apache.org/jira/browse/FLINK-21839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Piotr Nowojski reassigned FLINK-21839:
--------------------------------------

    Assignee: Yuan Mei

> SinkFunction snapshotState don't snapshot all data when trigger a 
> stop-with-drain savepoint
> -------------------------------------------------------------------------------------------
>
>                 Key: FLINK-21839
>                 URL: https://issues.apache.org/jira/browse/FLINK-21839
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Checkpointing
>    Affects Versions: 1.12.2
>            Reporter: Darcy Lin
>            Assignee: Yuan Mei
>            Priority: Major
>         Attachments: TestSink.java
>
>
> This problem was discovered when I was developing the flink code. In my flink 
> code, my custom sink don't send all data that be produced by event_time 
> window when trigger stop-with-drain savepoint .
> TestSink.java is a example that SinkFunction invoke() continues to run after 
> snapshotState() executed when trigger a stop-with-drain savepoint by rest api.
> {code:java}
> //TaskSink.java log
> sink open
> invoke: 0
> invoke: 1
> invoke: 2
> invoke: 3
> invoke: 4
> invoke: 5
> invoke: 6
> invoke: 7
> invoke: 8
> invoke: 9
> ...
> invoke: 425
> invoke: 426
> invoke: 427
> snapshotState
> invoke: 428 // It should be executed before snapshotState.
> sink close{code}



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