[jira] [Created] (SOLR-9731) Add jvm-wide JMX statistics for Solr

["Erick Erickson (JIRA)" <ji...@apache.org>]

Erick Erickson created SOLR-9731:
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             Summary: Add jvm-wide JMX statistics for Solr
                 Key: SOLR-9731
                 URL: https://issues.apache.org/jira/browse/SOLR-9731
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Erick Erickson


The statistics that can currently be gathered via JMX tend to be core-specific, making monitoring "how is the Solr node doing" harder than it needs to be. This JIRA is about exploring what it would take for instance-wide statistics to be JMX-enabled.

I'm imagining cumulative stats like:
> How many Solr<->Solr communications errors have there been?
> How many Solr<->ZK communication errors have there been
> How many full synchronizations have happened across all replicas?
> Operations people, fill in your favorite health monitoring bit here.

What do people think? Is JMX even the right thing? We have an admin end-point for gathering information, but that's not as "operations friendly".

I'm open to any suggestions for how/where to implement this, whether there are any huge "gotchas", bottleneck concerns, etc.



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