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https://issues.apache.org/jira/browse/SOLR-5473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14050346#comment-14050346
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Mark Miller commented on SOLR-5473:
-----------------------------------

I already talked about a lot of the problems that still existed, so i won't go 
overall all of them again. But there are lots of odd things, for example:

{code}
+ /** 
+ * this is only set by Overseer not to be set by others and only set inside 
the Overseer node. If Overseer has 
+ unfinished external collections which are yet to be persisted to ZK 
+ this map is populated and this class can use that information 
+ @param map The map reference 
+ */ 
+ public void setEphemeralCollectionData(Map map){ 
+ ephemeralCollectionData = map; 
+ } 
{code}

That is pretty ugly, it still talks about external collections and it's pretty 
cryptic in general. It appears to basically say, this is a hack for the 
overseer on the very user centric class. We can't just keep shoving in 
shortcuts and ugliness. You keep doing that and all the API's will fall under 
the weight. This patch adds so much complexity and API pain IMO. I'm fine with 
getting the end result done, but I'm not fine with not taking the time to get 
the code and api's and tests right for it.

Most of the changes you listed above do not cover the majority of the problems 
I've talked about above.

> Make one state.json per collection
> ----------------------------------
>
>                 Key: SOLR-5473
>                 URL: https://issues.apache.org/jira/browse/SOLR-5473
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>             Fix For: 5.0
>
>         Attachments: SOLR-5473-74 .patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-74.patch, 
> SOLR-5473-74.patch, SOLR-5473-74.patch, SOLR-5473-configname-fix.patch, 
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, 
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, 
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, 
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, SOLR-5473.patch, 
> SOLR-5473.patch, SOLR-5473.patch, SOLR-5473_undo.patch, 
> ec2-23-20-119-52_solr.log, ec2-50-16-38-73_solr.log
>
>
> As defined in the parent issue, store the states of each collection under 
> /collections/collectionname/state.json node



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