[jira] [Commented] (FLINK-5876) Mention Scala type fallacies for queryable state client serializers

["Ufuk Celebi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-5876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15878123#comment-15878123 ] 

Ufuk Celebi commented on FLINK-5876:
------------------------------------

Fixed in 15bb424 (release-1.2), 8e1775a (master).

> Mention Scala type fallacies for queryable state client serializers
> -------------------------------------------------------------------
>
>                 Key: FLINK-5876
>                 URL: https://issues.apache.org/jira/browse/FLINK-5876
>             Project: Flink
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Ufuk Celebi
>             Fix For: 1.3.0, 1.2.1
>
>
> FLINK-5801 shows a very hard to debug issue when querying state from the Scala API that can result in serializer mismatches between the client and the job.
> We should mention that the type serializers should be created via the Scala macros.
> {code}
> import org.apache.flink.streaming.api.scala._
> ...
> val keySerializer = createTypeInformation[Long].createSerializer(new ExecutionConfig)
> {code}



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