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https://issues.apache.org/jira/browse/FLINK-17573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105007#comment-17105007
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Tammy zhang commented on FLINK-17573:
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ok, i will post the question on the u...@flink.apache.org mailing list with
more details. please close it , thank you. @[~rmetzger]
> There is duplicate source data in ProcessWindowFunction
> -------------------------------------------------------
>
> Key: FLINK-17573
> URL: https://issues.apache.org/jira/browse/FLINK-17573
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream
> Reporter: Tammy zhang
> Priority: Major
>
> i consumed kafka topic data, and keyby the stream, then use a
> ProcessWindowFunction in this keyedStream, and a strange phenomenon appeared,
> the process function's sourceData become duplicated, like:
> Input Data iterator:[H2update 623.0 2020-05-08 15:19:25.14, H2update 297.0
> 2020-05-08 15:19:28.501, H2update 832.0 2020-05-08 15:19:29.415]
> data iterator end----------------------------------
> Input Data iterator:[H1400 59.0 2020-05-08 15:19:07.087, H1400 83.0
> 2020-05-08 15:19:09.521]
> data iterator end----------------------------------
> Input Data iterator:[H2insert 455.0 2020-05-08 15:19:23.066, H2insert 910.0
> 2020-05-08 15:19:23.955, H2insert 614.0 2020-05-08 15:19:24.397, H2insert
> 556.0 2020-05-08 15:19:27.389, H2insert 922.0 2020-05-08 15:19:27.761,
> H2insert 165.0 2020-05-08 15:19:28.26]
> data iterator end----------------------------------
> Input Data iterator:[H1400 59.0 2020-05-08 15:19:07.087, H1400 83.0
> 2020-05-08 15:19:09.521]
> data iterator end----------------------------------
> Input Data iterator:[H2update 623.0 2020-05-08 15:19:25.14, H2update 297.0
> 2020-05-08 15:19:28.501, H2update 832.0 2020-05-08 15:19:29.415]
> data iterator end----------------------------------
> Input Data iterator:[H2insert 455.0 2020-05-08 15:19:23.066, H2insert 910.0
> 2020-05-08 15:19:23.955, H2insert 614.0 2020-05-08 15:19:24.397, H2insert
> 556.0 2020-05-08 15:19:27.389, H2insert 922.0 2020-05-08 15:19:27.761,
> H2insert 165.0 2020-05-08 15:19:28.26]
> data iterator end----------------------------------
> I can ensure that there is no duplication of kafka data, Could you help me
> point out where the problem is, thanks a lot
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