Github user matyix commented on the issue:
https://github.com/apache/spark/pull/19775
Hello @felixcheung @jerryshao
The PR #11994 generally looks good for adding extensibility into the
Metrics system. This PR (Prometheus) works with the changes proposed in PR
#11994 out of the box, so no modification needed on our side.
As Prometheus is (becoming) a widely used monitoring system personally I
see a lot of value including this into the Spark code base, same as the current
metrics. I see PR #11994 rather a solution for those who build custom
specialised metrics sink.
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