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POJaxWS ClassCastException on JBoss
 

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    <p>I'm using JBoss 5.1.0.GA (for JDK6), and jaxws 2.2.6. When I invoke the webservice, I get the following exception:</p> <blockquote> <p>java.util.ServiceConfigurationError: javax.xml.ws.spi.Provider: Provider org.jboss.ws.core.jaxws.spi.ProviderImpl could not be instantiated: java.lang.ClassCastException at org.jboss.resource.work.WorkWrapper.completed(WorkWrapper.java:283)<br> at org.jboss.util.threadpool.BasicTaskWrapper.taskCompleted(BasicTaskWrapper.java:367) at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:268) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) </p> <p>Caused by: java.util.ServiceConfigurationError: javax.xml.ws.spi.Provider: Provider org.jboss.ws.core.jaxws.spi.ProviderImpl could not be instantiated: java.lang.ClassCastException at java.util.ServiceLoader.fail(ServiceLoader.java:207) at java.util.ServiceLoader.access$100(ServiceLoader.java:164) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:353) at java.util.ServiceLoader$1.next(ServiceLoader.java:421) at javax.xml.ws.spi.Provider.getProviderUsingServiceLoader(Provider.java:180) at javax.xml.ws.spi.Provider.provider(Provider.java:140) at javax.xml.ws.Service.(Service.java:92)<br> [...]<br> ... 3 more Caused by: java.lang.ClassCastException at java.lang.Class.cast(Class.java:2990) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:345)<br> ... 14 more</p> </blockquote> <p>I also tried to update jbossws to version 3.4.0 from 3.1.2.GA, nothing changed. I've read a lot of suggestions related to checking jars in lib/endorsed of JBoss, so this is the content:</p> <pre><code>activation.jar jaxb-api.jar jaxws-api.jar jbossws-native-factories.jar resolver.jar serializer.jar stax-api.jar xalan.jar xercesImpl.jar </code></pre> <p>I've also added the switch -verbose:class to the JVM: </p> <pre><code>[Loaded org.jboss.ws.core.jaxws.spi.ProviderImpl from jar:file:/Users/carlo/jboss-5.1.0.GA/common/lib/jbossws-native-core.jar!/] </code></pre> <p>and that class extends <code>javax.xml.ws.spi.Provider</code> (http://bit.ly/LK9bNE)</p> <p>Can someone help me what's going on here?</p> <p><strong>EDIT 1</strong><br> Ok, so I see that the ClassCastException is raised from: ServiceLoader.java line 345</p> <pre><code>S p = service.cast(Class.forName(cn, true, loader).newInstance()); </code></pre> <p>when service.cast is called, <code>this</code> is <code>javax.xml.ws.spi.Provider</code> and the arg to cast is <code>org.jboss.ws.core.jaxws.spi.ProviderImpl</code>. I still fail to understand the problem though.</p>
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    1. COYou could debug it using Eclipse and put a breakpoint on the exception: ClassCastException
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    2. COPS I've had a few problems with JAX-WS because it (the reference impl anyhow) is now integrated into the JDK. If you have another version of it on your classpath aswell as the version in the JDK, things like this tend to happen. Never heard of jbossws but it sounds like it could be a JAX-WS implementation
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    3. COI have those kind of problems before, in fact in my maven dependency I've excluded: javax.xml.stream, stax, saaj-impl, saaj-api and mimepull. And made the errors I hade disappear.
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