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  1. Flink
  2. FLINK-3427

Add watermark monitoring to JobManager web frontend

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    Description

      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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              Unassigned Unassigned
              rmetzger Robert Metzger
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