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https://issues.apache.org/jira/browse/CASSANDRA-12312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15417664#comment-15417664
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Stefan Podkowinski commented on CASSANDRA-12312:
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I find it somehow confusing to see the commits for the code changes in each
branch just as expected, but not for the documentation changes, which are now
part of the merge commit. It's a bit unfortunate that the author information is
lost in merge commits, so I'm wondering what the correct way to contribute
patches for the documentation would be to avoid this situation in the future.
> 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
> Labels: lhf
> Fix For: 2.2.8, 3.0.9, 3.9
>
> Attachments: 12312-2.2.patch, 12312-3.0.patch, 12312-trunk.patch,
> metrics-jvm-3.1.0.jar.asc
>
>
> 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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