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From Avlesh Singh <avl...@gmail.com>
Subject Re: ClassCastException from custom request handler
Date Mon, 03 Aug 2009 16:00:27 GMT
Can you cross check the class attribute for your handler in solrconfig.xml?
My guess is that it is specified as "solr.LiveCoresHandler". It should be
fully qualified class name - com.foo.path.to.LiveCoresHandler instead.

Moreover, I am damn sure that you did not forget to drop your jar into
solr.home/lib. Checking once again might not be a bad idea :)

Cheers
Avlesh

On Mon, Aug 3, 2009 at 9:11 PM, James Brady <james.colin.brady@gmail.com>wrote:

> Hi,
> I'm creating a custom request handler to return a list of live cores in
> Solr.
>
> On startup, I get this exception for each core:
>
> Jul 31, 2009 5:20:39 PM org.apache.solr.common. SolrException log
> SEVERE: java.lang.ClassCastException: LiveCoresHandler
>        at
> org.apache.solr.core.RequestHandlers$1.create(RequestHandlers.java:152)
>        at
> org.apache.solr.core.RequestHandlers$1.create(RequestHandlers.java:161)
>        at
>
> org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:140)
>        at
>
> org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:169)
>        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:444)
>
> I've tried a few variations on the class definition, including extending
> RequestHandlerBase (as suggested here:
>
> http://wiki.apache.org/solr/SolrRequestHandler#head-1de7365d7ecf2eac079c5f8b92ee9af712ed75c2
> )
> and implementing SolrRequestHandler directly.
>
> I'm sure that the Solr libraries I built against and those I'm running on
> are the same version too, as I unzipped the Solr war file and copies the
> relevant jars out of there to build against.
>
> Any ideas on what could be causing the ClassCastException? I've attached a
> debugger to the running Solr process but it didn't shed any light on the
> issue...
>
> Thanks!
> James
>

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