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https://issues.apache.org/jira/browse/SOLR-18004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18041352#comment-18041352
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Matthew Biscocho commented on SOLR-18004:
-----------------------------------------
With the move to OTEL the /admin/metrics API defaults to prometheus and no
longer supports JSON. The reason this throws is because the /admin/metrics
parameter has a nodes parameter which will aggregate all the metrics with calls
via javabin to a single node and the UI will parse that to display the UI view.
CC [~janhoy]
This doesn't seem supportable in this aggregation method anymore with this new
prometheus format and also kind of goes against what this endpoint should do
which is just scrape metrics for a node, not aggregate. Spoke with [~dsmiley]
offline, we could look into adding some kind of CORS support to jettys
configuration so the UI can call each node to aggregate instead of a single
node doing so. Any other suggestions are welcome.
> Admin UI nodes view throws "unsupported format requested: json"
> ---------------------------------------------------------------
>
> Key: SOLR-18004
> URL: https://issues.apache.org/jira/browse/SOLR-18004
> Project: Solr
> Issue Type: Sub-task
> Components: Admin UI, metrics
> Affects Versions: 10.0
> Reporter: Matthew Biscocho
> Priority: Major
> Attachments: Screenshot 2025-11-28 at 12.33.41 PM.png
>
>
> The admin UI cloud -> nodes view is throwing an error "Only Prometheus and
> OpenMetrics metric formats supported. Unsupported format requested: json".
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