Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3736
This won't make it into 1.3. For one the feature freeze is in effect since
today, so it is too late to merge it now.
That said it may be possible to merge it for 1.4 and maintain a separate
repository for a 1.3 version that we can also link in the docs. But I'm not
entirely sure.
I tried it out this morning, and it worked very well. There was an odd
thing where the host field in the metric identifier wasn't shown for the
taskmanager metrics but for the jobmanager, but that may hidden by Datadog
automatically when the hosts match. (i.e. the first part of the metric
identifier)
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