ClassCastException trying to run update preview

Question

I am getting a java.lang.ClassCastException after clicking on the Update Preview button.

The setup is using a standard Tridion 2013 Content Delivery stack (not the magic stuff some of you saw at #sdlinnovate), JSP-based site (tomcat) and JSP-hosted WebService for session preview. I get the following errors:

In odata's cd_core_log: No errors logged.

In tomcat's access log:

SEVERE: Servlet.service() for servlet [Content Delivery Web service] in context with path [/preview-ws] threw exception java.lang.ClassCastException: com.tridion.webservices.odata.input.handler.ODataResponse cannot be cast to com.tridion.webservices.odata.input.handler.ODataBatchResponse at com.tridion.webservices.odata.ODataWebservice.handleBatchRequest(ODataWebservice.java:147) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)[...]

In Windows Event Viewer:

Unable to update the changes using OData Service. The remote server returned an error: (500) Internal Server Error. Component: Tridion.ContentManager.Publishing.PreviewService Errorcode: 1003 User: NT AUTHORITY\NETWORK SERVICE StackTrace Information Details: at System.Net.HttpWebRequest.GetResponse() at System.Data.Services.Client.DataServiceContext.SaveResult.BatchRequest(Boolean replaceOnUpdate) at System.Data.Services.Client.DataServiceContext.SaveChanges(SaveChangesOptions options) at Tridion.ContentManager.Publishing.PreviewService.ServiceImplementation.Preview(IEnumerable1 publishedItemsInfo, TcmUri publishingTargetId) at Tridion.ContentManager.Publishing.PreviewService.ServiceImplementation.Preview(IEnumerable1 publishedItemsInfo, TcmUri publishingTargetId) at SyncInvokePreview(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)

Any clues?

Answer 1

Found it (thanks to Andrey G @ SDL)

The webservice ambient framework cartridge was commented out in cd_ambient_conf.xml.

<Cartridges>
    <Cartridge File="cd_webservice_preview_cartridge.xml"/>
</Cartridges>