in src/main/java/org/apache/dubbo/proxy/server/NettyServer.java [120:126]
protected void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast(
new LoggingHandler(NettyServer.class, LogLevel.DEBUG),
new HttpServerCodec(), new HttpObjectAggregator(512*1024*1024),
httpProcessHandler);
}