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oracle.portal.provider.v2.ProviderInstance
java.lang.ClassCastException: oracle.portal.provider.v2.ProviderInstance	at oracle.portal.provider.v2.render.http.URLRenderer.getURLStream(Unknown Source)	at oracle.portal.provider.v2.render.http.URLRenderer.renderBody(Unknown Source)	at oracle.portal.provider.v2.render.RenderManager.render(Unknown Source)	at oracle.portal.provider.v2.DefaultPortletInstance.render(Unknown Source)	at oracle.webdb.provider.v2.adapter.soapV1.ProviderAdapter.showPortlet(Unknown Source)	at oracle.webdb.provider.v2.adapter.soapV1.ProviderAdapter.handleHttp(Unknown Source)	at java.lang.reflect.Method.invoke(Native Method)	at oracle.webdb.provider.v2.adapter.SOAPServlet.doHTTPCall(Unknown Source)	at oracle.webdb.provider.v2.adapter.SOAPServlet.service(Unknown Source)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)	at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:59)	at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:523)	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)	at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:735)	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:151)	at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)