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https://issues.apache.org/jira/browse/FLINK-5480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16424206#comment-16424206
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ASF GitHub Bot commented on FLINK-5480:
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Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3117
@ShashwatRastogi-Reflektion It's a bit odd that there are different ID's
shown, I will have to look into that. It may be that one display accounts for
the uid while the other one doesn't; in any case one of them should be the task
ID.
I should've asked earlier; which version of Flink are you using?
If it is 1.2 or below, then I don't know at the moment what the problem
could be.
If it is 1.3 or above, the steps I mentioned have to be done for each
operator, and not task. That said, I'm not sure if we actually expose the id of
each operator anywhere in 1.3 in a nice way... You may have to resort to
trial&error; if a state can't be assigned to an operator you should get an
exception containing the ID of the state (unless you explicitly allow
[non-restored
state](https://ci.apache.org/projects/flink/flink-docs-master/ops/state/savepoints.html#allowing-non-restored-state),
which you can then use as the uid hash. If you are already on 1.4 you can
figure them out with the metric system (for example with the JMXReporter).
> 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
> Priority: Major
> Fix For: 1.2.0, 1.3.0
>
>
> 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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