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https://issues.apache.org/jira/browse/FLINK-3427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953612#comment-15953612
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Vladislav Pernin commented on FLINK-3427:
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What is the official way of monitoring backpressure ?
The rest_api is not documented any more and sends a "deprecated" response.
Shouldn't it be part of the metrics system ?
> Add watermark monitoring to JobManager web frontend
> ---------------------------------------------------
>
> Key: FLINK-3427
> URL: https://issues.apache.org/jira/browse/FLINK-3427
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API, Webfrontend
> Reporter: Robert Metzger
> Fix For: 1.3.0
>
>
> Currently, its quite hard to figure out issues with the watermarks.
> I think we can improve the situation by reporting the following information
> through the metrics system:
> - Report the current low watermark for each operator (this way, you can see
> if one operator is preventing the watermarks to rise)
> - Report the number of events arrived after the low watermark (users can see
> how accurate the watermarks are)
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