Aljoscha Krettek commented on FLINK-5155:

PR in https://github.com/apache/flink/pull/3108

> Deprecate ValueStateDescriptor constructors with default value
> --------------------------------------------------------------
>                 Key: FLINK-5155
>                 URL: https://issues.apache.org/jira/browse/FLINK-5155
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Aljoscha Krettek
> Having the default value in the descriptor is problematic with some 
> serialisers and we don't lose a feature because users can always check for 
> the null value and initialise with their own default value if necessary. 
> Right now, we're always forcing people to specify a default value even though 
> they don't need one.
> Of course, we should add constructors without a default value.

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