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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] [Commented] (SOLR-4735) Improve Solr metrics reporting
Date Fri, 02 Dec 2016 18:51:58 GMT


Andrzej Bialecki  commented on SOLR-4735:

bq. Will we be instantiating separate reporters for each `Group` then?
Part of the refactoring I'm working on is moving reporter configs to `solr.xml` under `<solr><metricReporters><reporter
name="graphite" group="jvm" class="..."/> ...` . Then appropriate reporters would be created
for each group at the time when the component that manages this group of metrics is initialized
(eg. "core" on SolrCore creation, "node" when `CoreContainer` is loaded etc).

Regarding reporters that could take multiple registries ... yeah, it seems a waste to create
separate reporters for each core if they have identical configs. I'm not sure yet how to solve
this - eg. for JMX reporting any sort of aggregate reporter would have to create multiple
`JMXReporter`s anyway, one per registry, because that's how the API is implemented.

bq. it would be nice if we could just specify which registry we'd like a reporter to attach
Hmm, we could perhaps use either `group` or `registry` attribute in the reporter config.

> Improve Solr metrics reporting
> ------------------------------
>                 Key: SOLR-4735
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>            Assignee: Andrzej Bialecki 
>            Priority: Minor
>         Attachments: SOLR-4735.patch, SOLR-4735.patch, SOLR-4735.patch, SOLR-4735.patch
> Following on from a discussion on the mailing list:
> It would be good to make Solr play more nicely with existing devops monitoring systems,
such as Graphite or Ganglia.  Stats monitoring at the moment is poll-only, either via JMX
or through the admin stats page.  I'd like to refactor things a bit to make this more pluggable.
> This patch is a start.  It adds a new interface, InstrumentedBean, which extends SolrInfoMBean
to return a [[Metrics|]] MetricRegistry, and a couple
of MetricReporters (which basically just duplicate the JMX and admin page reporting that's
there at the moment, but which should be more extensible).  The patch includes a change to
RequestHandlerBase showing how this could work.  The idea would be to eventually replace the
getStatistics() call on SolrInfoMBean with this instead.
> The next step would be to allow more MetricReporters to be defined in solrconfig.xml.
 The Metrics library comes with ganglia and graphite reporting modules, and we can add contrib
plugins for both of those.
> There's some more general cleanup that could be done around SolrInfoMBean (we've got
two plugin handlers at /mbeans and /plugins that basically do the same thing, and the beans
themselves have some weirdly inconsistent data on them - getVersion() returns different things
for different impls, and getSource() seems pretty useless), but maybe that's for another issue.

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