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https://issues.apache.org/jira/browse/SOLR-8215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14977257#comment-14977257
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Mark Miller commented on SOLR-8215:
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Would be great if we could get a test that could catch this.
> SolrCloud can select a core not in active state for querying
> ------------------------------------------------------------
>
> Key: SOLR-8215
> URL: https://issues.apache.org/jira/browse/SOLR-8215
> Project: Solr
> Issue Type: Bug
> Reporter: Varun Thacker
>
> A query can be served by a core which is not in active state if the request
> hits the node which hosts these non active cores.
> We explicitly check for only active cores to search against in
> {{CloudSolrClient#sendRequest}} Line 1043 on trunk.
> But we don't check this if someone uses the REST APIs
> {{HttpSolrCall#getCoreByCollection}} should only pick cores which are active
> on line 794 on trunk.
> We however check it on line 882/883 in HttpSolrCall, when we try to find
> cores on other nodes when it's not present locally.
> So let's fix {{HttpSolrCall#getCoreByCollection}} to make the active check as
> well.
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