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From "Yi Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7431) log message for InvalidMagicNumberException may be incorrect
Date Mon, 24 Nov 2014 06:45:12 GMT
Yi Liu created HDFS-7431:
----------------------------

             Summary: log message for InvalidMagicNumberException may be incorrect
                 Key: HDFS-7431
                 URL: https://issues.apache.org/jira/browse/HDFS-7431
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: security
            Reporter: Yi Liu
            Assignee: Yi Liu


For security mode, HDFS now supports that Datanodes don't require root or jsvc if {{dfs.data.transfer.protection}}
is configured.

Log message for {{InvalidMagicNumberException}}, we miss one case: 
when the datanodes run on unprivileged port and {{dfs.data.transfer.protection}} is configured
to {{authentication}} but {{dfs.encrypt.data.transfer}} is not configured. SASL handshake
is required. But a low version dfs client is used, then {{InvalidMagicNumberException}} is
thrown with log:
{quote}
Failed to read expected encryption handshake from client at .... Perhaps the client is running
an older version of Hadoop which does not support encryption
{quote}

Recently I run HDFS built on trunk and security is enabled, but the client is 2.5.1 version.
Then I got the above log message, but actually I have not configured encryption.



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