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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7431) log message for InvalidMagicNumberException may be incorrect
Date Thu, 18 Dec 2014 23:08:14 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HDFS-7431:
--------------------------------
       Resolution: Fixed
    Fix Version/s: 2.7.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

+1 for the patch.  I committed it to trunk and branch-2.  Yi, thank you for the contribution.

> 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
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7431.001.patch, HDFS-7431.002.patch, HDFS-7431.003.patch
>
>
> 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 and a low version dfs client is used, then {{InvalidMagicNumberException}} is
thrown and we write 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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