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https://issues.apache.org/jira/browse/SOLR-17269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved SOLR-17269.
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Fix Version/s: 9.7
Resolution: Fixed
> Don't publish synthetic collection to ZK in solr coordinator nodes
> ------------------------------------------------------------------
>
> Key: SOLR-17269
> URL: https://issues.apache.org/jira/browse/SOLR-17269
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 9.6
> Reporter: Patson Luk
> Priority: Major
> Fix For: 9.7
>
> Time Spent: 5h 20m
> Remaining Estimate: 0h
>
> Coordinator node uses a "synthetic collection/core" (Prefixed with
> `.sys.COORDINATOR-COLL-`) to proxy queries to other data node.
> However, such collection was actually registered to the ZK as well (like a
> normal collection). This could be problematic at times when we have other
> tools that read the cluster status and are mistaken that as a real collection.
> The proposal here is the introduction of a new `SyntheticSolrCore` which
> subclasses `SolrCore`, such core bypasses ZK publish steps of regular core
> (and avoid creating core.properties etc) hence preventing other tools from
> detecting such synthetic collection.
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