[HDDS-1710] Publish JVM metrics via Hadoop metrics

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Component/s: Ozone Datanode, Ozone Manager, SCM
• Labels: pull-request-available
• Target Version/s: 0.5.0
• Sprint: Done
• Assignee: Marton Elek
• Reporter: Marton Elek
• Created: 20/Jun/19 08:27
• Updated: 09/Jun/20 18:30
• Resolved: 22/Jul/19 23:49

Description

In ozone metrics can be published with the help of hadoop metrics (for example via PrometheusMetricsSink)

The basic jvm metrics are not published by the metrics system (just with JMX)

I am very interested about the basic JVM metrics (gc count, heap memory usage) to identify possible problems in the test environment.

Fortunately it's very easy to turn it on with the help of org.apache.hadoop.metrics2.source.JvmMetrics.

Issue Links

• causes: HDDS-1867 Invalid Prometheus metric name from JvmMetrics
• links to: GitHub Pull Request #994
• links to: GitHub Pull Request #1144