You execute the command hdfs dfs -is to view the directory listing on the Edge/Gateway node in a secured cluster, but get an error. You were able to execute the same command successfully 24 hours ago. No changes have been made to the user or the infrastructure. How do you fix the problem?
A. You need to obtain a valid Kerberos ticket by executing the KINIT command.
B. You need to reboot the Hadoop cluster to reinstate access to users.
C. A valid Kerberos ticket exists but you need to initialize it using the KINIT command.
D. You are on wrong node. The hdfs dfs -is command can only be executed from the Name Node.
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