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https://issues.apache.org/jira/browse/FLINK-2457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653646#comment-14653646
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ASF GitHub Bot commented on FLINK-2457:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/983#issuecomment-127614982
In many cases, the problem that Tuple0 does not consume anything, will be
caught by the fact that other data that is stored or shipped with the tuple
will advance the stream.
However, relying on that is super dangerous. As soon as you hit a case
where that is not given, it will not work any more.
> Integrate Tuple0
> ----------------
>
> Key: FLINK-2457
> URL: https://issues.apache.org/jira/browse/FLINK-2457
> Project: Flink
> Issue Type: Improvement
> Reporter: Matthias J. Sax
> Assignee: Matthias J. Sax
> Priority: Minor
>
> Tuple0 is not cleanly integrated:
> - missing serialization/deserialization support in runtime
> - Tuple.getTupleClass(int arity) cannot handle arity zero, ie, cannot create
> an instance of Tuple0
> Tuple0 is currently only used in Python API, but will be integrated into
> Storm compatibility, too.
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