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From "Alexandre Rafalovitch (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-4373) In multicore, lib directives in solrconfig.xml cause conflict and clobber directives from earlier cores
Date Tue, 26 Feb 2013 14:24:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-4373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587159#comment-13587159
] 

Alexandre Rafalovitch commented on SOLR-4373:
---------------------------------------------

"ant example" does not build additional libraries in dist and contrib directories. And that's
what I am using for the test. 

I guess I can change the path in the test to use pre-built libraries from downloaded distribution,
but would still be useful to know how to build the whole lot.
                
> In multicore, lib directives in solrconfig.xml cause conflict and clobber directives
from earlier cores
> -------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-4373
>                 URL: https://issues.apache.org/jira/browse/SOLR-4373
>             Project: Solr
>          Issue Type: Bug
>          Components: multicore
>    Affects Versions: 4.1
>            Reporter: Alexandre Rafalovitch
>            Priority: Blocker
>              Labels: lib, multicore
>             Fix For: 4.2, 5.0, 4.1.1
>
>         Attachments: multicore-bug.zip
>
>
> Having lib directives in the solrconfig.xml files of multiple cores can cause problems
when using multi-threaded core initialization -- which is the default starting with Solr 4.1.
> The problem manifests itself as init errors in the logs related to not being able to
find classes located in plugin jars, even though earlier log messages indicated that those
jars had been added to the classpath.
> One work around is to set {{coreLoadThreads="1"}} in your solr.xml file -- forcing single
threaded core initialization.  For example...
> {code}
> <?xml version="1.0" encoding="utf-8" ?>
> <solr coreLoadThreads="1">
>   <cores adminPath="/admin/cores">
>     <core name="core1" instanceDir="core1" />
>     <core name="core2" instanceDir="core2" />
>   </cores>
> </solr>
> {code}
> (Similar problems may occur if multiple cores are initialized concurrently using the
/admin/cores handler)

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