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https://issues.apache.org/jira/browse/FLINK-10680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16664527#comment-16664527
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Hequn Cheng commented on FLINK-10680:
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[~Paul Lin] Hi, thanks for your contribution. I think we have to correct the
document rather than change the code. The window start of both `offset -8` and
`offset 16` would be same. This problem has been discussed
[here|https://issues.apache.org/jira/browse/FLINK-10284] FLINK-10284.
> Unable to set negative offsets for TumblingEventTimeWindow
> ----------------------------------------------------------
>
> Key: FLINK-10680
> URL: https://issues.apache.org/jira/browse/FLINK-10680
> Project: Flink
> Issue Type: Bug
> Components: DataStream API
> Affects Versions: 1.6.1
> Reporter: Paul Lin
> Priority: Major
>
> The following code given in documentation throws an IllegalArgumentException:
> TumblingEventTimeWindows parameters must satisfy 0 <= offset < size.
> > TumblingEventTimeWindows.of(Time.days(1), Time.hours(-8));
> By design, the offset could be negative to fit in different time zones.
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