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https://issues.apache.org/jira/browse/HDFS-6666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vijay Bhat updated HDFS-6666:
-----------------------------
    Target Version/s: 2.6.0, 3.0.0  (was: 3.0.0, 2.6.0)
        Release Note: 
The patch has the following changes:
* Abort namenode and datanode startup if kerberos is enabled but block tokens 
are not enabled.
* Test case that verifies the appropriate exception is thrown when the cluster 
is brought up with kerberos enabled and block tokens disabled (using Chris N's 
suggestion in the comments)
              Status: Patch Available  (was: Open)

> 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: 2.5.0, 3.0.0
>            Reporter: Chris Nauroth
>            Assignee: Vijay Bhat
>            Priority: Minor
>
> 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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