How to Fix HDFS Access Denied for User Root: Superuser Privilege Required

Question

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

geko · Accepted Answer

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 - hdfshdfs dfsadmin -reportBasically, 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 propertydfs.permissions.supergroupand add "root" to this group (which points to an os group) HTH, Gerd

drkumar · Answer

Try to remove the hdfs in the superuser group and check

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