[jira] Commented: (SOLR-1408) Classes in ${solr.home}/lib are not able to extend classes loaded by solr war - ClassCastException

["Avlesh Singh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-1408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12751684#action_12751684 ] 

Avlesh Singh commented on SOLR-1408:
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bq. I am starting the jetty server from within a unit test for integration testing purposes. 
Does it fail in unit testing?

I too suspect that there is a problem. I too have similar extensions of DIH and UpdateProcessors, which lie in the "lib". I have never faced any such issue on any of the platforms.


> Classes in ${solr.home}/lib are not able to extend classes loaded by solr war - ClassCastException
> --------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-1408
>                 URL: https://issues.apache.org/jira/browse/SOLR-1408
>             Project: Solr
>          Issue Type: Bug
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.3
>            Reporter: Luke Forehand
>
> When extending org.apache.solr.handler.dataimport.DataSource, I would like to package my extended class in ${solr.home}/lib to that I can keep the vanilla copy of my solr.war intact.  The problem is I encounter a ClassCastException when Solr tries to create a newInstance of my extended class.
> Although the parent classloader of ${solr.home}/lib classloader loads DataSource, I am still getting a ClassCastException when a class in ${solr.home}/lib extends DataSource.
> The solr instance is being deployed to a jetty plus server that is running inside a unit test.

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