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https://issues.apache.org/jira/browse/FLINK-13879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328322#comment-17328322
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Flink Jira Bot commented on FLINK-13879:
----------------------------------------
This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> It seems that there might be some problem with the
> DataStream.keyBy(xx).maxBy(yy)
> ---------------------------------------------------------------------------------
>
> Key: FLINK-13879
> URL: https://issues.apache.org/jira/browse/FLINK-13879
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream
> Affects Versions: 1.9.0
> Reporter: liusong
> Priority: Major
> Labels: stale-major
> Attachments: image-2019-08-28-09-01-32-356.png,
> image-2019-08-28-09-02-18-077.png, image-2019-08-28-09-02-47-835.png
>
>
> following error:
> !image-2019-08-28-09-02-18-077.png!
> !image-2019-08-28-09-02-47-835.png!
> Because this 'RowTypeInfo' is subclass of 'TupleTypeInfoBase' ，so
> 'typeInfo.isTupleType()' always return true when the typeInfo is
> RowTypeInfo,then enter 'else if (typeInfo.isTupleType())'，but why do it do
> that 'TupleTypeInfo tupleTypeInfo = (TupleTypeInfo) typeInfo'?it is work when
> i try to use 'TupleTypeInfoBase tupleTypeInfo = (TupleTypeInfoBase) typeInfo'
> instead of it。
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