Your cluster implements HDFS High Availability (HA). Your two NameNodes are named nn01 and nn02. What occurs when you execute the command: hdfs haadmin -failover nn01 nn02?

Question

Options

• Ann02 is fenced, and nn01 becomes the active NameNode
• Bnn01 is fenced, and nn02 becomes the active NameNode
• Cnn01 becomes the standby NameNode and nn02 becomes the active NameNode
• Dnn02 becomes the standby NameNode and nn01 becomes the active NameNode

• A
  4% (1)
• B
  11% (3)
• C
  82% (23)
• D
  4% (1)

Explanation

Correct answer is C. B is not acceptable as the first Name-node could become stand-by without fencing.

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