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https://issues.apache.org/jira/browse/SOLR-9880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15769476#comment-15769476
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Andrzej Bialecki commented on SOLR-9880:
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I understand your concern. However, these two reporters seemed like a natural
addition for several reasons:
* they are already a part of the Metrics distribution,
* they are maintained in the upstream package.
* they integrate with popular systems,
* in particular, Graphite protocol is so dead simple that it could be re-used
by other systems, too - it just sends plain-text lines to a socket, with the
name of the metric, its value and timestamp separated by space:
{code}
myPrefix.solr.node.cores.lazy 0 1482394715
myPrefix.solr.node.cores.loaded 1 1482394715
myPrefix.solr.node.cores.unloaded 0 1482394715
{code}
But you raise a good point - we should provide a file-based reporter too, as
the lowest common denominator reporting mechanism... In fact, one is already
included in the Metrics distribution ;) - the {{Slf4jReporter}} - and it's
trivial to add a wrapper. This reporter could use a Logger per metrics group
(configurable), so it should be easy to tweak the logging configuration so that
its output goes to separate file(s) with rolling.
> Add Ganglia and Graphite metrics reporters
> ------------------------------------------
>
> Key: SOLR-9880
> URL: https://issues.apache.org/jira/browse/SOLR-9880
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Minor
> Fix For: master (7.0), 6.4
>
>
> Originally SOLR-4735 provided implementations for these reporters (wrappers
> for Dropwizard components to use {{SolrMetricReporter}} API).
> However, this functionality has been split into its own issue due to the
> additional transitive dependencies that these reporters bring:
> * Ganglia:
> ** metrics-ganglia, ASL, 3kB
> ** gmetric4j (Ganglia RPC implementation), BSD, 29kB
> * Graphite
> ** metrics-graphite, ASL, 10kB
> ** amqp-client (RabbitMQ Java client, marked optional in pom?), ASL/MIT/GPL2,
> 190kB
> IMHO these are not very large dependencies, and given the useful
> functionality they provide it's worth adding them.
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