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https://issues.apache.org/jira/browse/FLINK-20337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek closed FLINK-20337.
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Resolution: Implemented
release-1.12: d0757e95c3c33d4f13377f2c14c179076b3795b2 (and commits around it)
> Allow stateful migration from StreamingFileSink to FileSink
> ------------------------------------------------------------
>
> Key: FLINK-20337
> URL: https://issues.apache.org/jira/browse/FLINK-20337
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Affects Versions: 1.12.0
> Reporter: Guowei Ma
> Assignee: Guowei Ma
> Priority: Critical
> Fix For: 1.12.0
>
>
> Flink-1.12 introduces the `FileSink` in FLINK-19510, which can guarantee the
> exactly once semantics both in the streaming and batch execution mode. We
> need to provide a way for the user who uses `StreamingFileSink` to migrate
> from `StreamingFileSink` to `FileSink`.
> For this purpose we propose to let the new sink writer operator could load
> the previous StreamingFileSink's state and then the `SinkWriter` could have
> the opertunity to handle the old state.
>
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