[jira] [Created] (FLINK-3427) Add watermark monitoring to JobManager web frontend

[Shang Yuanchun (Jira)]

Robert Metzger created FLINK-3427:
-------------------------------------

             Summary: 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: Streaming, Webfrontend
            Reporter: Robert Metzger


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)



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)