Patson Luk created SOLR-17269:
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Summary: 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
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCloud
Affects Versions: 9.6
Reporter: Patson Luk
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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