[rules-users] KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage

[HonorGod]

I am getting the following error while accessing decision tables that were
uploaded in Guvnor -

java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage  
	at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:418)
	at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:120)
	at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109)
	at
com.barcap.efg.fine.drools.rules.CorporateActionRecommendationService.getSession(CorporateActionRecommendationService.java:153)
	at
com.barcap.efg.fine.drools.rules.CorporateActionRecommendationService.init(CorporateActionRecommendationService.java:120)
	at
com.barcap.efg.fine.drools.rules.CorporateActionRecommendationService.run(CorporateActionRecommendationService.java:50)
	at
com.barcap.efg.fine.farm.launcher.FarmAppLauncher.main(FarmAppLauncher.java:184)
Caused by: java.io.FileNotFoundException:
http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/packages/CorporateAction/
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
	at org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:76)
	at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:407)
	... 6 more

----------------
Java Code

    private StatefulKnowledgeSession getSession() {
        
        LogUtil.caRecommendationLogger.info("Getting session for Rules
Engine ...");
        // Set the interval on the ResourceChangeScannerService if you are
to use it
        // and default of 60s is not desirable.
        final ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
        // set the disk scanning interval to 30s, default is 60s
        sconf.setProperty("drools.resource.scanner.interval", "30");

        ResourceFactory.getResourceChangeScannerService().configure(sconf);

        knowledgeBaseFromDecisionTable =
KnowledgeBaseFactory.newKnowledgeBase();

        final KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();

        // we want to scan directories, not just files, turning this on
turns on file
        // scanning
        aconf.setProperty("drools.agent.scanDirectories", "true");
        // resource changes results in a new instance of the KnowledgeBase
being
        // built, this cannot currently be set to false for incremental
building
        aconf.setProperty("drools.agent.newInstance", "true");

        final KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("kagent",
knowledgeBaseFromDecisionTable, aconf);
       
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml"));
       
//kagent.applyChangeSet(ResourceFactory.newFileResource("c:/changeset.xml"));
        return kagent.getKnowledgeBase().newStatefulKnowledgeSession();

    } 
-----------------
changeset.xml

<?xml version="1.0" encoding="UTF-8"?>
<change-set xmlns='http://drools.org/drools-5.0/change-set'
        xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
        xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd'>
        <add>
                <resource
source='http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/packages/CorporateAction/'
type='PKG' />
        </add>
</change-set> 


Please help. 

Thanks!

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