The NN should determine its own hostname using the same method as the DN
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Key: HDFS-2193
URL: https://issues.apache.org/jira/browse/HDFS-2193
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node, security
Affects Versions: 0.23.0
Reporter: Aaron T. Myers
Assignee: Aaron T. Myers
When the "{{_HOST}}" replacement feature of Kerberos principal names is used,
the various Hadoop daemons must determine their own canonical hostname in order
to form their principal name.
Presently, the NN determines its own hostname based on the configured value of
"{{fs.default.name}}", whereas the DNs determine their hostnames based on the
result of "{{InetAddress.getLocalHost().getCanonicalHostName()}}". This
asymmetry can cause confusion during configuration of a secure cluster.
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