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https://issues.apache.org/jira/browse/FLINK-4812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16345340#comment-16345340
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ASF GitHub Bot commented on FLINK-4812:
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/5155
I like this a lot now! 👍
One last comment/idea I had is this: I don't like that `StreamTask` has
`getInputWatermarkGauge()` for the only reason that we need it in the
`OperatorChain` to set it on the head operator. Could this not be set at the
end of `OneInputStreamTask.init()` the same way it is set for
`TwoInputStreamTask.init()` (where we then also would have to set the
min-input-watermark)?
> Report Watermark metrics in all operators
> -----------------------------------------
>
> Key: FLINK-4812
> URL: https://issues.apache.org/jira/browse/FLINK-4812
> Project: Flink
> Issue Type: Improvement
> Components: Metrics
> Reporter: Robert Metzger
> Assignee: Chesnay Schepler
> Priority: Critical
> Fix For: 1.5.0
>
>
> As reported by a user, Flink does currently not export the current low
> watermark for sources
> (http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/currentLowWatermark-metric-not-reported-for-all-tasks-td13770.html).
> This JIRA is for adding such a metric for the sources as well.
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