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https://issues.apache.org/jira/browse/FLINK-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14599370#comment-14599370
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ASF GitHub Bot commented on FLINK-2194:
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Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/814#issuecomment-114863239
@rmetzger suggested to add a specialized Kryo serializer for the `Writable`
interface. That way we could directly call the write method of `Writable` types
which might be faster than Kryo's default serializer.
> Type extractor does not support Writable type
> ---------------------------------------------
>
> Key: FLINK-2194
> URL: https://issues.apache.org/jira/browse/FLINK-2194
> Project: Flink
> Issue Type: Bug
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
>
> The type extractor supports sub types of {{Writable}} but not {{Writable}}
> itself. The reason is that it wants to create a {{WritableTypeInfo}} which is
> not possible for the interface {{Writable}}, though. A solution would be to
> treat the {{Writable}} interface like a generic type.
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