hadoop fs -cat 不能查看文件

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hadoop fs -cat /user/root/ds.txt

不存在

[root@master hadoop-2.6.5]#hadoop fs -ls -R /user/root

-rw-r--r-- 2 root supergroup 9135 2017-07-28 01:55 /user/root/ds.tx

[root@master hadoop-2.6.5]# hadoop fs -cat /user/root/ds.txt

cat: `/user/root/ds.txt': No such file or directory

重新复制一遍后OK 

[root@master hadoop-2.6.5]# hadoop fs -put /opt/exercise/ds.txt ds1.txt

[root@master hadoop-2.6.5]# hadoop fs -ls -R /user/root

-rw-r--r-- 2 root supergroup 9135 2017-07-28 01:55 /user/root/ds.tx

-rw-r--r-- 2 root supergroup 9135 2017-07-28 02:27 /user/root/ds1.txt

[root@master hadoop-2.6.5]# hadoop fs -ls -d /user/root

drwxr-xr-x - root supergroup 0 2017-07-28 02:27 /user/root

[root@master hadoop-2.6.5]# hadoop fs -cat /user/root/ds1.txt

17.759065824032646,0.6708203932499373

20.787886563063058,0.7071067811865472

17.944905786933322,0.5852349955359809

22.410906749998933,0.6500000000000014

26.314727674070117,0.5590169943749447

不知道什么原因！！！！

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