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https://issues.apache.org/jira/browse/SOLR-17458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18030694#comment-18030694
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David Smiley commented on SOLR-17458:
-------------------------------------
In some test logs across Solr tests, I see a number of warnings from
OpenTelemetry similar to this:
{{WARNING:
CallbackRegistration{instrumentDescriptors=[InstrumentDescriptor\{name=solr_searcher_live_docs_cache,
description=LiveDocs cache metrics, unit=, type=OBSERVABLE_COUNTER,
valueType=LONG, advice=Advice{explicitBucketBoundaries=null,
attributes=null}}]} has called close() multiple times.}}
> Metrics: switch from DropWizard to OpenTelemetry
> ------------------------------------------------
>
> Key: SOLR-17458
> URL: https://issues.apache.org/jira/browse/SOLR-17458
> Project: Solr
> Issue Type: Improvement
> Reporter: Matthew Biscocho
> Assignee: Matthew Biscocho
> Priority: Major
> Labels: pull-request-available
> Fix For: main (10.0)
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Solr currently captures metrics with Dropwizard 4. There was some limitations
> to Dropwizard, biggest one being metrics without tags/attributes making
> aggregation difficult and requires the Prometheus Exporter to work with
> Grafana.
> Creating this to track and explore integrating OpenTelemetry into Solr and
> possibly replace Dropwizard giving a larger exposure of observability tools.
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