[jira] [Created] (CASSANDRA-12312) Restore JVM metric export for metric reporters

["Stefan Podkowinski (JIRA)" <ji...@apache.org>]

Stefan Podkowinski created CASSANDRA-12312:
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             Summary: Restore JVM metric export for metric reporters
                 Key: CASSANDRA-12312
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12312
             Project: Cassandra
          Issue Type: Bug
            Reporter: Stefan Podkowinski
            Assignee: Stefan Podkowinski


JVM instrumentation as part of dropwizard metrics has been moved to a separate {{metrics-jvm}} artifact in metrics-v3.0. After CASSANDRA-5657, no jvm related metrics will be exported to any reporter configured via {{metrics-reporter-config}}, as this isn't part of {{metrics-core}} anymore. As memory and GC stats are essential for monitoring Cassandra, this turns out to be a blocker for us for upgrading to 2.2.

I've included a patch that would add the now separate {{metrics-jvm}} package and enables some of the provided metrics on startup in case a metrics reporter is used ({{-Dcassandra.metricsReporterConfigFile}}).



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