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https://issues.apache.org/jira/browse/SOLR-18640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18142620#comment-18142620
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Chris M. Hostetter commented on SOLR-18640:
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Transposing some relevant comments from the parent issue...
{quote}Idea: the overseer could be responsible for emitting such cluster level
metrics, it already has access to whatever it needs.
{quote}
...
{quote}alternative idea: let ever node emit metrics based on it's current view
of the cluster state – that way dashboards/alerts that aggregates data from
multiple nodes could indicate when nodes have a differing view of the cluster
state (for an extended period)
{quote}
...
{quote}I guess this can be decided on a per-metric basis, and split it into
separate sub tasks. E.g. to reconstruct the replica state panels we could
probably let each node emit the replica state for the replicas on that node and
prometheus would get the full picture. Unless a node is down, in which case it
would not answer the metrics endpoint and there will be no data as opposed to
explicit replica state data; in which case the overseer would be the only one
able to report the down state for those replicas...
{quote}
> Solr 10.x replica status metrics
> --------------------------------
>
> Key: SOLR-18640
> URL: https://issues.apache.org/jira/browse/SOLR-18640
> Project: Solr
> Issue Type: Sub-task
> Reporter: Chris M. Hostetter
> Priority: Major
>
> As noted in SOLR-18147 , Solr 10's otel metrics are missing many replica
> status related metrics from Solr 9 dur to the removal of the prometheus
> exporter...
> {quote}One of the panels I really like from the old one were things around
> state on replicas from Solr. Problem is I think that info only came from the
> prometheus exporter because it parsed a cluster state API and not metrics
> endpoint. I'd like reintroduce those metrics back properly so they are
> actually exposed letting us create things like state timelines of Solr from
> down to recovering or active. But I guess until then that will be missing.
> {quote}
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