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https://issues.apache.org/jira/browse/FLINK-10680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16664559#comment-16664559
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Paul Lin commented on FLINK-10680:
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[~hequn8128] Thanks for the pointer. I looked into the commit logs and found
this parameter check is added in a refactoring of tests
[FLINK-4994|https://issues.apache.org/jira/browse/FLINK-4994] which has no
description of the offset API changes, so I think it is more likely to be a bug
rather than an expected change.
> 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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