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Posted to issues@flink.apache.org by "liusong (Jira)" <ji...@apache.org> on 2019/08/28 01:19:00 UTC
[jira] [Created] (FLINK-13879) It seems that there might be some
problem with the DataStream.keyBy(xx).maxBy(yy)
liusong created FLINK-13879:
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Summary: 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
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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