Noble Paul created SOLR-5510:
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             Summary: genericCoreNodeNames="${genericCoreNodeNames:true}" 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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