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https://issues.apache.org/jira/browse/FLINK-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15350720#comment-15350720
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ASF GitHub Bot commented on FLINK-4121:
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/2165
I think it would be better to only have one place in the doc where we say
that timestamps/watermarks are in milliseconds (with a red warning box, so it's
visible). I can change it while merging
> Add timeunit (ms) to docs for timestamps and watermarks
> -------------------------------------------------------
>
> Key: FLINK-4121
> URL: https://issues.apache.org/jira/browse/FLINK-4121
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API
> Reporter: Jonas Traub
> Priority: Trivial
>
> I'm teaching a class where students are supposed to implement Flink streaming
> programs. It seems to be unclear for them, that the time unit of timestamps
> and watermarks is milliseconds.
> They just see TimeWindow.seconds(...) or something similar and assume the
> timestamps to be of the same unit (seconds) which is obviously not the case.
> I just checked the documentation and there is no explicit specification of
> the time unit used for timestamps.
> After short talk with [~aljoscha], I'll open a mini-PR to address this issue.
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