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https://issues.apache.org/jira/browse/FLINK-4047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek updated FLINK-4047:
------------------------------------
    Fix Version/s: 1.4.0

> 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
>              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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