java.lang.LinkageError: ClassCastException

Question

I do experience a really annoying problem with TestNG and RESTeasy.

I do have a class that runs several tests against an API class which uses the RESTeasy framework

Answer 1

I faced the same issue when deploying my application to JBoss v6.1 - somehow understood that the problem was due to the same package structure of RuntimeDelegate.class existing within jesrey-core and jboss' jaxrs-api jar

Below is my pom.xml

    
    
        com.sun.jersey
        jersey-client
        1.8
        
            
                com.sun.jersey
                resteasy-jaxrs
            
        
    

    
    
        org.codehaus.jackson
        jackson-mapper-asl
        1.8.5
    

    
        com.sun.jersey
        jersey-json
        1.9
         
            
                com.sun.jersey
                jersey-core
            
        
    

After my war is deployed to JBoss, just removed resteasy.deployer folder from jboss' server\default\deployers folder. Ran my application and it worked.

I would be happy if someone explain why this error got resolved this way? (I think JBoss' has unnecessarily shipped with resteasy.deployers jars when developers could include the jars on their own in their apps) - Not to hide that I tried deploying my war on Tomcat and it worked smoothly.