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https://issues.apache.org/jira/browse/SOLR-5510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834052#comment-13834052
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Mark Miller commented on SOLR-5510:
-----------------------------------

coreNodeName is different than genericCoreNodeNames and is important so that 
you can start up a new node and have it replace a node that died.

> genericCoreNodeNames="${genericCoreNodeNames:false}" and old style solr.xml 
> fails to create collection
> ------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-5510
>                 URL: https://issues.apache.org/jira/browse/SOLR-5510
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.6
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Minor
>
> See this for some more details 
> https://gist.github.com/serba/1fe113e78ae7e01a4f58
> This is a regression caused by SOLR-5311
> There are two reasons why a core does not have a reference in clusterstate
> # It is starting up for the first time (core creation)
> # Somebody invoked a DELETEREPLICA when the node itself was down
> we neded to differentiate these two because for 1) the registration should 
> succeed and for #2 the registration should fail
> The only way to do that was to check for the presence of the attribute 
> coreNodeName in the core.properties. In case #1 it would be absent and in 
> case#2 it would be present
> but when genericCoreNodeNames="${genericCoreNodeNames:false}"
> ZkController#getCoreNodeName(getCoreNodeName) behaves similarly for both the 
> cases and hence the failure



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