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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3427) Add watermark monitoring to JobManager web frontend
Date Tue, 21 Feb 2017 13:50:46 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15876001#comment-15876001

ASF GitHub Bot commented on FLINK-3427:

Github user uce commented on a diff in the pull request:

    --- Diff: flink-runtime-web/web-dashboard/app/scripts/index.coffee ---
    @@ -30,7 +30,7 @@ angular.module('flinkApp', ['ui.router', 'angularMoment', 'dndLists'])
     .value 'flinkConfig', {
       jobServer: ''
    -#  jobServer: 'http://localhost:8081/'
    +  # jobServer: 'http://localhost:8081/'
    --- End diff --
    Can we keep the indentation as before? I think Angular is a little picky with the config
here and if we uncomment this line with the new indentation it will not parse the jobServer
value. I'm not sure about this. If you think it's not a problem, it's OK to leave it as is.

> 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)

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