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From Avlesh Singh <avl...@gmail.com>
Subject Re: ClassCastException from custom request handler
Date Tue, 04 Aug 2009 03:54:27 GMT
>
> I'm sure I have the class name right - changing it to something patently
> incorrect results in the expected "org.apache.solr.common.SolrException:
> Error loading class ...", rather thanthe ClassCastException.
>
You are right about that, James.

Which Solr version are you using?
Can you please paste the relevant pieces in your solrconfig.xml and the
request handler class you have created?

Cheers
Avlesh

On Mon, Aug 3, 2009 at 10:51 PM, James Brady <james.colin.brady@gmail.com>wrote:

> Hi,
> Thanks for your suggestions!
>
> I'm sure I have the class name right - changing it to something patently
> incorrect results in the expected
> "org.apache.solr.common.SolrException: Error loading class ...", rather
> than
> the ClassCastException.
>
> I did have some problems getting my class on the app server's classpath.
> I'm
> running with solr.home set to "multicore", but creating a multicore/lib
> directory and putting my request handler class in there resulted in "Error
> loading class" errors.
>
> I found that setting jetty.class.path to include multicore/lib (and also
> explicitly point at Solr's core and common JARs) fixed the "Error loading
> class" errors, leaving these ClassCastExceptions...
>
> 2009/8/3 Avlesh Singh <avlesh@gmail.com>
>
> > 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
> > >
> >
>
>
>
> --
> http://twitter.com/goodgravy
> 512 300 4210
> http://webmynd.com/
> Sent from Bury, United Kingdom
>

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