question Re: report: Access denied for user root. Superuser privilege is required in Archives of Support Questions (Read Only)

report: Access denied for user root. Superuser privilege is required

Arf — Fri, 19 Jan 2018 14:38:25 GMT

Hi,

when i run hdfs dfsadmin -report command. I get the Access denied for user root. Superuser privilege is required error. please help?

hdfs dfsadmin -report
Configured Capacity: 778288271867904 (707.85 TB)
Present Capacity: 776586815760931 (706.30 TB)
DFS Remaining: 282227055766051 (256.68 TB)
DFS Used: 494359759994880 (449.62 TB)
DFS Used%: 63.66%
Under replicated blocks: 0
Blocks with corrupt replicas: 0
Missing blocks: 0
Missing blocks (with replication factor 1): 0

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report: Access denied for user root. Superuser privilege is required

Re: report: Access denied for user root. Superuser privilege is required

drkumar — Thu, 18 Jan 2018 15:49:04 GMT

Try to remove the hdfs in the superuser group and check

Re: report: Access denied for user root. Superuser privilege is required

Arf — Thu, 18 Jan 2018 15:52:13 GMT

how to go to superuser group ?

Re: report: Access denied for user root. Superuser privilege is required

geko — Thu, 18 Jan 2018 16:38:06 GMT

Hi,

that indicates your os user "root" is not the superuser of HDFS (root is just the "superuser" of the operating system).

Try to do the same as user "hdfs" (which is by default the hdfs superuser), as root do:

su - hdfs
hdfs dfsadmin -report

Basically, the HDFS superuser is the user, under which account the Namenode is started.

Alternatively you can add the os-user "root" to the group which is set as hdfs supergroup. Check for property

dfs.permissions.supergroup

and add "root" to this group (which points to an os group)

HTH, Gerd

Re: report: Access denied for user root. Superuser privilege is required

Arf — Thu, 18 Jan 2018 16:49:00 GMT

Thanks, issue has been resolved.