Github user guoxiaolongzte commented on the issue:
https://github.com/apache/spark/pull/18829
Json Metrics information is very full, a lot of information UI is currently
unable to show, but this information for the application developers is also
very important.
I understand that for the spark application developers, they observe the
spark cluster information in three ways, WEB UI, LOG and mestrics.
But we used to look at the masterIP: 8080 UI to view the information,
instead of using api and log on to the server to view the log information. Api
is not very easy to remember.
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