Hadoop error: Bad connection to FS. command aborted.

运行

11/08/31 23:09:37 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=30000011/08/31 23:09:37 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.idFound 1 items-rw-r--r--   1 root supergroup        628 2011-08-31 23:01 /user/root/books/URLCat.java

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