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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6666) Abort NameNode and DataNode startup if security is enabled but block access token is not enabled.
Date Thu, 09 Apr 2015 21:08:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14488282#comment-14488282
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Chris Nauroth commented on HDFS-6666:
-------------------------------------

Thank you for making the suggested changes in the logging and the test.

I apologize if this was unclear in my last comment, but I actually was suggesting that we
remove NameNode.java completely from this patch.  Instead, the patch could change BlockManager.java.
 The {{createBlockTokenSecretManager}} method already has the same logic to check the configuration.
 It currently logs an error.  We'd just need to change that to throw an exception instead
of logging.

> Abort NameNode and DataNode startup if security is enabled but block access token is
not enabled.
> -------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6666
>                 URL: https://issues.apache.org/jira/browse/HDFS-6666
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, namenode, security
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Chris Nauroth
>            Assignee: Vijay Bhat
>            Priority: Minor
>         Attachments: HDFS-6666.001.patch, HDFS-6666.002.patch, HDFS-6666.003.patch
>
>
> Currently, if security is enabled by setting hadoop.security.authentication to kerberos,
but HDFS block access tokens are disabled by setting dfs.block.access.token.enable to false
(which is the default), then the NameNode logs an error and proceeds, and the DataNode proceeds
without even logging an error.  This jira proposes that this it's invalid to turn on security
but not turn on block access tokens, and that it would be better to fail fast and abort the
daemons during startup if this happens.



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