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java.lang.NullPointerException at javax.servlet.GenericServlet.getServletName(GenericServlet.java:322) at javax.servlet.GenericServlet.log(GenericServlet.java:277) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:219) at com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:117) at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:429) at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)