Questions about the HDFs default port 8020

Tonight look at the Hadoop the definitive GUID, to the third chapter about HDFs, I follow his example, in Eclipse get good code, execution has been error, said not even localhost:8020, I checked the next configuration file, There is really no configuration of this port, but core-site.xml inside there is a hdfs:localhost:9000, see there is no way to try the idea, that will default to start 8020 port, is not another problem, and then see this aunt's Bovencai try, the results are positive, May be the configuration legacy issue (the official quick start for 0.20.2 is indeed 9000 this port http://hadoop.apache.org/common/docs/r0.20.2/quickstart.html)

http://jimmee.javaeye.com/blog/770390