Exception in thread "main" java.lang.NoSuchMethodError: org.jboss.netty.handler.codec.http.HttpRequest.headers()Lorg/jboss/netty/handler/codec/http/HttpHeaders;
at com.ning.http.client.providers.netty.request.NettyRequestFactory.newNettyRequest(NettyRequestFactory.java:286)
at com.ning.http.client.providers.netty.request.NettyRequestSender.newNettyRequestAndResponseFuture(NettyRequestSender.java:179)
at com.ning.http.client.providers.netty.request.NettyRequestSender.sendRequestWithCertainForceConnect(NettyRequestSender.java:133)
at com.ning.http.client.providers.netty.request.NettyRequestSender.sendRequest(NettyRequestSender.java:115)
at com.ning.http.client.providers.netty.NettyAsyncHttpProvider.execute(NettyAsyncHttpProvider.java:87)
at com.ning.http.client.AsyncHttpClient.executeRequest(AsyncHttpClient.java:506)
.....