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https://issues.apache.org/jira/browse/FLINK-21848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther closed FLINK-21848.
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Resolution: Duplicate
Should have been fixed in FLINK-21013. Please reopen if not.
> table api -----window opening for event time。NullPointer
> --------------------------------------------------------
>
> Key: FLINK-21848
> URL: https://issues.apache.org/jira/browse/FLINK-21848
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Reporter: wangbin
> Priority: Major
> Attachments: image-2021-03-18-09-14-21-726.png,
> image-2021-03-18-09-14-38-073.png, image-2021-03-18-09-14-52-536.png
>
>
> * According to the code of the official website, I wrote an example of window
> opening for event time.but nullpoint！
> * _I don't know why_
> * _!image-2021-03-18-09-14-21-726.png!_
> _!image-2021-03-18-09-14-38-073.png!_
>
> _!image-2021-03-18-09-14-52-536.png!_
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