hdfs fsck command issue

[#1]

Hi 

When i run  hdfs fsck -list-corruptfileblocks it is saying super user privilege is required .I am logged in as root user .Any idea what could be the reason .

 hdfs fsck -list-corruptfileblocks

Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 0 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 0 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 1 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 0 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 0 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED
FSCK ended at Wed Mar 25 19:42:40 SGT 2015 in 1 milliseconds
Access denied for user root. Superuser privilege is required
Fsck on path '/' FAILED

[#2 · Accepted solution]

The superuser for HDFS is 'hdfs' in CDH installations. Please run the
command as the 'hdfs' user instead.

[#3]

command  :

sudo -u hdfs hdfs  fsck -list-corruptfileblocks

For deleting corrupted files :

sudo -u hdfs hdfs  fsck / -delete

Thanks.