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https://issues.apache.org/jira/browse/FLINK-6214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16392966#comment-16392966
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ASF GitHub Bot commented on FLINK-6214:
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Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/5376
Ah, one problem: What happens if the offset is larger (by absolute value)
than the window length? Then the offset would still be negative with this
change.
> WindowAssigners do not allow negative offsets
> ---------------------------------------------
>
> Key: FLINK-6214
> URL: https://issues.apache.org/jira/browse/FLINK-6214
> Project: Flink
> Issue Type: Bug
> Components: DataStream API
> Affects Versions: 1.2.0
> Reporter: Timo Walther
> Priority: Major
>
> Both the website and the JavaDoc promotes
> ".window(TumblingEventTimeWindows.of(Time.days(1), Time.hours(-8))) For
> example, in China you would have to specify an offset of Time.hours(-8)". But
> both the sliding and tumbling event time assigners do not allow offset to be
> negative.
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