ASF GitHub Bot commented on FLINK-5480:

Github user StefanRRichter commented on the issue:

    cc @uce 

> User-provided hashes for operators
> ----------------------------------
>                 Key: FLINK-5480
>                 URL: https://issues.apache.org/jira/browse/FLINK-5480
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>    Affects Versions: 1.2.0
>            Reporter: Stefan Richter
>            Assignee: Stefan Richter
> We could allow users to provided (alternative) hashes for operators in a 
> StreamGraph. This can make migration between Flink versions easier, in case 
> the automatically produced hashes between versions are incompatible. For 
> example, users could just copy the old hashes from the web ui to their job.

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