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https://issues.apache.org/jira/browse/SOLR-14418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17089539#comment-17089539
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Andrzej Bialecki edited comment on SOLR-14418 at 4/22/20, 10:40 AM:
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That query is executed only when {{cloudManager == null}}, which is when Solr
is running in non-ZK (non cloud) mode.
Perhaps this is a moot point and we should run this handler exclusively in
cloud mode.
was (Author: ab):
That query is executed only when {{cloudManager == null}}, which is when Solr
is running in non-ZK (non cloud) mode.
> MetricsHistoryHandler: don't query .system collection
> -----------------------------------------------------
>
> Key: SOLR-14418
> URL: https://issues.apache.org/jira/browse/SOLR-14418
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Reporter: David Smiley
> Priority: Minor
>
> The MetricsHistoryHandler queries the .system collection on startup with a
> match-all-docs query just to see that it exists. I think we should do this
> without actually issuing a query, like use ClusterState. Ideally
> SolrClient.getCollections(regexp) would exist but alas. In CloudSolrClient,
> it'd work via cluster state. No query needed!
> It's death by a thousand cuts in our Solr tests. In tests, I wish Solr
> features like this were opt-in.
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