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Date: Fri, 14 Sep 2012 20:11:07 +1100 (NCT)
From: "Lance Norskog (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Message-ID: <1659204621.79592.1347613868001.JavaMail.jiratomcat@arcas>
In-Reply-To: <1891777400.43.1346015167609.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (SOLR-3760) Build packaging of complex contrib
 packages just plain does not work
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    [ https://issues.apache.org/jira/browse/SOLR-3760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455683#comment-13455683 ] 

Lance Norskog commented on SOLR-3760:
-------------------------------------

A more detailed explanation of the problem:

* lucene/analysis/X code in a jar.
* Lucene jar depends on third-party jar.
* lucene/analysis/X/ivy.xml downloads third-party jar.
* lucene/analysis/X build works.
* Solr factory in contrib/X depends on Lucene jar which depends on third-party jar.
* Third-party jar is downloaded in Solr contrib/X/ivy.xml
** Thus, contrib/X build works because classpath is factory->lucene jar->third-party jar.

However! 

* Lucene jar is packed into Solr war.
* Lucene third-party jar is not packed into Solr war.
* Solr factory jar is not packed into Solr war.
* example/solr/collection1/conf/solrconfig.xml refers to
** ....../contrib/X/lib
** ....../dist/apache-solr-X-.....
*** both are in the same classloader- order of <lib> declarations is not a problem.
* solrconfig.xml classloader can find Solr factory in apache-solr-X-.....jar
* Solr factory classloader supplied by solrconfig.xml can find lucene jar in solr.war
* Lucene jar uses solr.war classloader
** solr.war classloader cannot see third-party jar
** _solr/contrib/X factory for lucene/analysis/X fails to load_

(I think I got that right.)
                
> Build packaging of complex contrib packages just plain does not work
> --------------------------------------------------------------------
>
>                 Key: SOLR-3760
>                 URL: https://issues.apache.org/jira/browse/SOLR-3760
>             Project: Solr
>          Issue Type: Improvement
>          Components: Build
>            Reporter: Lance Norskog
>
> The build system packages Lucene libraries in the Solr war, but they do not pack libraries required by the Lucene libraries. The UIMA and analysis-extras contrib packages have factories for the Lucene libraries.
> The net effect is that when solrconfig.xml include <lib> directives for dist/xxx-contribX-xxx.jar and solr/contrib/contribX/lib, this fails because the lucene analyzer file inside the solr war cannot find the library files in solr/contrib/contribX/lib because the classloader for the war does not find the libraries from the <lib> directives.
> Two alternative fixes are presented below.

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