求助：hadoop 启动时namenode启动不成功。报错日志见文章
2012-05-22 11:20:16,703 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.lang.IllegalArgumentException: Does not contain a valid host:port authority: file:///at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:162)
at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:198)
at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:228)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:262)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:496)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1279)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1288)
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