Hi James!
James Brady schrieb:
There is *something* strange going on with classloaders; when I put my
.class files in the right place in WEB-INF/lib in a repackaged solr.war
file, it's not found by the plugin loader ("Error loading class").
So the plugin classloader isn't seeing stuff inside WEB-INF/lib.
That explains why the plugin loader sees my class files when I point
jetty.class.path at the right directory, but in that situation I also need
to point jetty.class.path at the Solr JARs explicitly.
you cannot be sure that it sees *your* files. It only sees a class that
qualifies with the name that is requested in your code. It's obviously
not the class the code expects, though - as it results in a
ClassCastException at some point. It might help to have a look at where
and why that casting went wrong.
I wrote a custom EntityProcessor and deployed it first under
WEB-INF/classes, and now in the plugin directory, and that worked
without a problem. My first guess is that something with your packaging
is wrong - what do you mean by "default" package? What is the full name
of your class and how does its path in the file system look like?
Can you paste the stack trace of the exception?
Chantal
Still, how would ClassCastExceptions be caused by class loader paths not
being set correctly? I don't follow you... To get a ClassCastException, the
class to cast to must have been found. The cast-to class must not be in the
object's inheritance hierarchy, or be built against a different version, no?
2009/8/4 Noble Paul നോബിള് नोब्ळ् <noble.p...@corp.aol.com>
I guess this is a classloader issue. it is worth trying to put it in
the WEB-INF/lib of the solr.war
On Tue, Aug 4, 2009 at 5:35 PM, James Brady<james.colin.br...@gmail.com>
wrote:
Hi, the LiveCoresHandler is in the default package - the behaviour's the
same if I have it in a properly namespaced package too...
The requestHandler name can start either be a path (starting with '/') or
a
qt name:
http://wiki.apache.org/solr/SolrRequestHandler
starting w/ '/' helps in accessing it directly
2009/8/4 Noble Paul നോബിള് नोब्ळ् <noble.p...@corp.aol.com>
what is the package of LiveCoresHandler ?
I guess the requestHandler name should be name="/livecores"
On Tue, Aug 4, 2009 at 5:04 PM, James Brady<james.colin.br...@gmail.com
wrote:
Solr version: 1.3.0 694707
solrconfig.xml:
<requestHandler name="livecores" class="LiveCoresHandler" />
public class LiveCoresHandler extends RequestHandlerBase {
public void init(NamedList args) { }
public String getDescription() { return ""; }
public String getSource() { return ""; }
public String getSourceId() { return ""; }
public NamedList getStatistics() { return new NamedList(); }
public String getVersion() { return ""; }
public void handleRequestBody(SolrQueryRequest req,
SolrQueryResponse
rsp) {
Collection<String> names =
req.getCore().getCoreDescriptor().getCoreContainer().getCoreNames();
rsp.add("cores", names);
// if the cores are dynamic, you prob don't want to cache
rsp.setHttpCaching(false);
}
}
2009/8/4 Avlesh Singh <avl...@gmail.com>
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.br...@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 <avl...@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.br...@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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email chantal.ackerm...@btelligent.de
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