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https://issues.apache.org/jira/browse/FLINK-9983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16561619#comment-16561619
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Aljoscha Krettek commented on FLINK-9983:
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See FLINK-6328 for reference, where this behaviour was changed. We have to be
careful not to count savepoints as retained checkpoints.
> Savepoints should count as checkpoints when recovering
> ------------------------------------------------------
>
> Key: FLINK-9983
> URL: https://issues.apache.org/jira/browse/FLINK-9983
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Reporter: Aljoscha Krettek
> Priority: Blocker
> Fix For: 1.6.0
>
>
> If they are not used when recovering you can get intro problems with
> duplicate output data when a failure occurs after a savepoint was taken but
> before the next checkpoint occurs.
> The fix, in the long run, is to differentiate between savepoints that have
> side effects and those that don't. The former would be used for a
> "stop-with-savepoint" scenario while the latter is for in-between savepoints.
> This is harder to implement, so I vote for the easy fix described for now for
> fixing the duplication problems.
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