Hadoop的FSShell命令报:ipc.Client: Retrying connect to server

[root@CephMDS bin]# ./start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-mapred.sh
starting namenode, logging to /home/hadoop/bin/../logs/hadoop-root-namenode-CephMDS.out
172.16.211.30: starting datanode, logging to /home/hadoop/bin/../logs/hadoop-root-datanode-rhel5.out
172.16.211.26: starting datanode, logging to /home/hadoop/bin/../logs/hadoop-root-datanode-CephOSD.out
172.16.211.25: starting secondarynamenode, logging to /home/hadoop/bin/../logs/hadoop-root-secondarynamenode-CephMDS.out
starting jobtracker, logging to /home/hadoop/bin/../logs/hadoop-root-jobtracker-CephMDS.out
172.16.211.30: starting tasktracker, logging to /home/hadoop/bin/../logs/hadoop-root-tasktracker-rhel5.out
172.16.211.26: starting tasktracker, logging to /home/hadoop/bin/../logs/hadoop-root-tasktracker-CephOSD.out

[root@CephMDS bin]# hadoop fs -ls
11/03/24 14:34:15 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000
11/03/24 14:34:16 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.id
11/03/24 14:34:18 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 0 time(s).
11/03/24 14:34:19 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 1 time(s).
11/03/24 14:34:20 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 2 time(s).
11/03/24 14:34:21 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 3 time(s).
11/03/24 14:34:22 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 4 time(s).
11/03/24 14:34:23 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 5 time(s).
11/03/24 14:34:24 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 6 time(s).
11/03/24 14:34:25 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 7 time(s).
11/03/24 14:34:26 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 8 time(s).
11/03/24 14:34:27 INFO ipc.Client: Retrying connect to server: /172.16.211.25:9000. Already tried 9 time(s).