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https://issues.apache.org/jira/browse/SOLR-11435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16191072#comment-16191072
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Mano Kovacs commented on SOLR-11435:
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CC: [~varunthacker], [[email protected]]
> Replicas failed to be deleted can overwrite replicas of recreated collections
> -----------------------------------------------------------------------------
>
> Key: SOLR-11435
> URL: https://issues.apache.org/jira/browse/SOLR-11435
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 7.0
> Reporter: Mano Kovacs
>
> When a replica comes up that was deleted from ZK while it was gone, it can
> replace replicas in ZK if the collection an core names are equal.
> Reproduction:
> # Create {{collection1}} with 1 shard, 2 replicas on {{node1}} and {{node2}}
> # Shut down {{node2}}
> # Delete {{collection1}}
> # Create {{collection1}} on {{node1}} and {{node3}}
> # Start {{node2}}
> Expected:
> {{node2}} will not initialize node as it is not assigned to in ZK
> ({{legacyCloud=false}})
> Actual:
> {{node2}} will overwrite the {{baseurl}} in {{state.json}} for one of the
> replicas as the {{coreNodeName}} and the collection name will match the core
> it has.
> Note: SOLR-7248 introduced a {{baseurl}} comparison which was removed in
> SOLR-10279.
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