Reamer opened a new pull request #3971:
URL: https://github.com/apache/zeppelin/pull/3971
### What is this PR for?
This PR includes:
- Configurable Prometheus monitoring with endpoint (`/metrics`)
- Rewrite the JMX metric endpoint
- two new Healthcheck endpoints (`/health/readiness`, `/health/liveness`)
and a ping endpoint (`/ping`)
- some default metrics (jetty, jvm, interpreter)
### What type of PR is it?
- Improvement
### What is the Jira issue?
* https://issues.apache.org/jira/browse/ZEPPELIN-4977
* https://issues.apache.org/jira/browse/ZEPPELIN-4976
### How should this be tested?
* Travic-CI: https://travis-ci.com/github/Reamer/zeppelin/builds/201231567
### Questions:
* Does the licenses files need update? Yes, included in PR
* Is there breaking changes for older versions? Yes, the JMX output for
metrics changes
* Does this needs documentation? Yes, included in PR
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