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https://issues.apache.org/jira/browse/SOLR-2180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley resolved SOLR-2180.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 4.0
                   3.1
                   1.4.2

I packported to 3.x and 1.4.x

It's unclear exactly what would have triggered this bug... the 
SearchHandler.handleRequest normally catches exceptions and returns normally, 
so a normal query exception wouldn't have.  I'm sure there were some ways 
though.

> Requests to Embedded Solr (often) leave old Searchers open
> ----------------------------------------------------------
>
>                 Key: SOLR-2180
>                 URL: https://issues.apache.org/jira/browse/SOLR-2180
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>    Affects Versions: 1.4.2, 1.5, 3.1, 4.0
>            Reporter: Lance Norskog
>             Fix For: 1.4.2, 3.1, 4.0
>
>
> SolrEmbeddedServer.request() fails to call SolrQueryRequest.close() at the 
> very end of a successful request. This (in some situations) causes 
> EmbeddedSolr to leave old Searchers open until the Solr core stops (core 
> unload, the JVM restarts). This leaves old Solr and Lucene caches in place, 
> which causes a memory leak.
> A fix for this was committed on the trunk on Sunday, Oct/15/2010. 
> [Revision r1023599  to 
> SolrEmbeddedServer|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/src/webapp/src/org/apache/solr/client/solrj/embedded/EmbeddedSolrServer.java?diff_format=h&revision=1023599&view=markup]
> This should be backported, or the problem checked for, in 1.4.2 and 3.1. 

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