Harsh J created HDFS-7580:
-----------------------------

             Summary: NN -> JN communication should use reusable authentication 
methods
                 Key: HDFS-7580
                 URL: https://issues.apache.org/jira/browse/HDFS-7580
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: journal-node, namenode
    Affects Versions: 2.5.0
            Reporter: Harsh J


It appears that NNs talk to JNs via general SaslRPC in secure mode, causing all 
requests to be carried out with a kerberos authentication. This can cause 
delays and occasionally NN failures if the KDC used does not respond in its 
default timeout period (30s, whereas the QJM writes come with default of 20s).



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