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java.lang.ClassCastException: 	at java.lang.Class.cast(	at	at$1.visitValueProperty(	at	at	at	at	at	at	at	at	at	at	at javax.servlet.http.HttpServlet.service(	at javax.servlet.http.HttpServlet.service(	at	at	at	at	at	at	at	at	at	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(	at org.mortbay.jetty.servlet.ServletHandler.handle(	at	at org.mortbay.jetty.servlet.SessionHandler.handle(	at org.mortbay.jetty.handler.ContextHandler.handle(	at org.mortbay.jetty.webapp.WebAppContext.handle(	at org.mortbay.jetty.handler.HandlerWrapper.handle(	at org.mortbay.jetty.handler.RequestLogHandler.handle(	at org.mortbay.jetty.handler.HandlerWrapper.handle(	at org.mortbay.jetty.Server.handle(	at org.mortbay.jetty.HttpConnection.handleRequest(	at org.mortbay.jetty.HttpConnection$RequestHandler.content(	at org.mortbay.jetty.HttpParser.parseNext(	at org.mortbay.jetty.HttpParser.parseAvailable(	at org.mortbay.jetty.HttpConnection.handle(	at	at org.mortbay.thread.QueuedThreadPool$