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https://issues.apache.org/jira/browse/FLINK-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15998371#comment-15998371
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Ufuk Celebi commented on FLINK-5440:
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Unfortunately, I haven't followed the most recent development in this area. If
the error message has been changed, feel free to close this issue.
> Misleading error message when migrating and scaling down from savepoint
> -----------------------------------------------------------------------
>
> Key: FLINK-5440
> URL: https://issues.apache.org/jira/browse/FLINK-5440
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Reporter: Ufuk Celebi
> Priority: Minor
>
> When resuming from an 1.1 savepoint with 1.2 and reducing the parallelism
> (and correctly setting the max parallelism), the error message says something
> about a missing operator which is misleading. Restoring from the same
> savepoint with the savepoint parallelism works as expected.
> Instead it should state that this kind of operation is not possible.
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