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https://issues.apache.org/jira/browse/SOLR-3680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423398#comment-13423398
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Hoss Man commented on SOLR-3680:
--------------------------------

As an example of how this bit me:

* i loaded the form, edited only the "instanceDir" field, and hit submit. 
* i was just doing some quick testing so i didn't care what core name was being 
used, but the value i could see "new_core" wasn't actaully sent
* error in the logs: "java.lang.RuntimeException: Core needs a name"

Another example i can easily imagine where someone would be confused:

* user loads the form
* they fill in the "name" and "instanceDir" but leave dataDir as the "data" 
ghost value because that's what they want
* no value is actually sent for dataDir, so the default in the solrconfig.xml 
files is used -- and it may be something else.
                
> Core Admin UI "Add Core" screen has confusing "ghost" defaults
> --------------------------------------------------------------
>
>                 Key: SOLR-3680
>                 URL: https://issues.apache.org/jira/browse/SOLR-3680
>             Project: Solr
>          Issue Type: Bug
>          Components: web gui
>    Affects Versions: 4.0-ALPHA
>            Reporter: Hoss Man
>            Assignee: Stefan Matheis (steffkes)
>
> Currently the "Add Core" screen in the admin UI has all of the form fields 
> filled in with what i can only describe as "ghost values":
> * if you click on them they vanish
> * if you click away w/o typing anything they re-appear
> * if you submit the form with a ghost value left in place, no value is sent
> i think we should consider:
> * removing these ghost values completley
> * using some visual indicator of what blanks are required

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