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https://issues.apache.org/jira/browse/FLINK-4047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181011#comment-16181011
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ASF GitHub Bot commented on FLINK-4047:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/4659
> Fix documentation about determinism of KeySelectors
> ---------------------------------------------------
>
> Key: FLINK-4047
> URL: https://issues.apache.org/jira/browse/FLINK-4047
> Project: Flink
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 1.1.0, 1.0.3
> Reporter: Fabian Hueske
> Priority: Blocker
> Labels: starter
> Fix For: 1.4.0
>
>
> KeySelectors must return deterministic keys, i.e., if invoked multiple times
> on the same object, the returned key must be the same.
> The documentation about this aspect is broken ("The key can be of any type
> and be derived from arbitrary computations.").
> We need to fix the JavaDocs of the {{KeySelector}} interface and the web
> documentation
> (https://ci.apache.org/projects/flink/flink-docs-master/apis/common/index.html#specifying-keys).
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