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https://issues.apache.org/jira/browse/SOLR-17853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18017918#comment-18017918
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Matthew Biscocho commented on SOLR-17853:
-----------------------------------------
[~dsmiley] So I was doing digging on the SolrInfoMBeanHandler and the way it
was used for the "Plugins / Stats" was with very custom components to place
these Dropwizard metrics in special Map objects to work and fit a response to
be read from the UI to show metrics on that tab. Based on this [ref-guide
page|https://solr.apache.org/guide/solr/latest/deployment-guide/mbean-request-handler.html]
and looking at the class, the handler needs to change significantly. Some of
the parameters need to be changed to fix this. I can change this endpoint to
wrap around Prometheus formatted metrics into a SimpleOrderedMap that
structures by category but that doesn't make sense from a prometheus view point
because it doesn't structure with a hierarchy structure like dropwizard but
uses attributes instead. I'm also a bit against wrapping Prometheus metrics
into a map just to support this because we are going to be writing a custom
implementation and tightly coupling components to work with API making things
break easily like if we want to change a category name. Also I don't think the
term MBean makes sense here anymore but I don't know much about JMX or how/if
this was used with it? What if we remove this endpoint and just have the UI
call the /admin/metrics endpoint and then structure the way the page looks like
then (Not sure how easy or hard this would be on the UI to change)? Metrics
should be seen from the endpoint anyways IMO instead of making multiple APIs
just to support reading different formats.
> Migrate SolrInfoMBeanHandler stats to OTEL for Admin UI
> -------------------------------------------------------
>
> Key: SOLR-17853
> URL: https://issues.apache.org/jira/browse/SOLR-17853
> Project: Solr
> Issue Type: Sub-task
> Reporter: Matthew Biscocho
> Priority: Major
> Attachments: Screenshot 2025-08-13 at 10.47.29 AM.png
>
>
> The /solr/\{collection}/admin/mbeans?stats=true endpoint converts Dropwizard
> metrics into a JSON formatted output. This response is used to populate the
> "Plugins / Stats" page on the admin UI for a core.
> This needs to somehow be bridged in with OTEL and readable for the Admin UI.
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