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https://issues.apache.org/jira/browse/SOLR-4663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson updated SOLR-4663:
---------------------------------

    Attachment: SOLR-4663.patch

All tests run with this patch, putting up for comment.

Still have to deal with Yonik's and Hoss's suggestions about recording core 
creation errors rather than hard-failing.

But the major change here is that creating cores via core-admin should 
correctly persist to solr.xml.

Persisting is an incredible pain. I'll be Sooooooo happy when we obsolete that 
nonsense.
                
> Log an error if more than one core points to the same data dir.
> ---------------------------------------------------------------
>
>                 Key: SOLR-4663
>                 URL: https://issues.apache.org/jira/browse/SOLR-4663
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 4.3, 5.0
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Minor
>         Attachments: SOLR-4663.patch, SOLR-4663.patch
>
>
> In large multi-core setups, having mistakes whereby two or more cores point 
> to the same data dir seems quite possible. We should at least complain very 
> loudly in the logs if this is detected.
> Should be a very straightforward check at core discovery time.
> Is this serious enough to keep Solr from coming up at all?

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