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https://issues.apache.org/jira/browse/FLINK-18998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17180411#comment-17180411
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Chesnay Schepler commented on FLINK-18998:
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Do we display anywhere in the UI whether we even use event-time? I couldn't
find it so far. If not, then this may be rather difficult, since we'd have to
wire things from the UI all the way to the ExecutionGraph, and have that
information readily queryable in there as well.
> No watermark is shown on Flink UI when ProcessingTime is used
> -------------------------------------------------------------
>
> Key: FLINK-18998
> URL: https://issues.apache.org/jira/browse/FLINK-18998
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Web Frontend
> Affects Versions: 1.12.0, 1.11.1
> Reporter: Jun Qin
> Priority: Major
> Labels: usability
> Fix For: 1.12.0
>
> Attachments: screenshot_2020-08-18_at_10.57.39.png
>
>
> As stated in the subject, no watermark is shown on Flink UI when
> ProcessingTime is used, see the attached screenshot. It is better to be more
> specific, like "Watermarks are only available if EventTime is used."
>
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