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https://issues.apache.org/jira/browse/SOLR-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13510748#comment-13510748
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Robert Muir commented on SOLR-1028:
-----------------------------------

I can't reproduce these failures, even with master seed. The problem seems to 
be testCachingLimit.

The rest of it is noise, because the try/finally in testCachingLimit doesn't 
close the cores it opens.
This causes the endTrackingSearchers() to fire additional class-level failures 
which just add to noise.

Is there any way we can take the endTrackingSearchers/zkClients and instead 
implement it as a test rule,
plugging it into the class rules chain, and so it won't do this if the test 
already failed?

                
> Automatic core loading unloading for multicore
> ----------------------------------------------
>
>                 Key: SOLR-1028
>                 URL: https://issues.apache.org/jira/browse/SOLR-1028
>             Project: Solr
>          Issue Type: New Feature
>          Components: multicore
>    Affects Versions: 4.0, 5.0
>            Reporter: Noble Paul
>            Assignee: Erick Erickson
>             Fix For: 4.1, 5.0
>
>         Attachments: SOLR-1028.patch, SOLR-1028.patch
>
>
> usecase: I have many small cores (say one per user) on a single Solr box . 
> All the cores are not be always needed . But when I need it I should be able 
> to directly issue a search request and the core must be STARTED automatically 
> and the request must be served.
> This also requires that I must have an upper limit on the no:of cores that 
> should be loaded at any given point in time. If the limit is crossed the 
> CoreContainer must unload a core (preferably the least recently used core)  
> There must be a choice of specifying some cores as fixed. These cores must 
> never be unloaded 

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