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https://issues.apache.org/jira/browse/ACCUMULO-1717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778984#comment-13778984
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Christopher Tubbs commented on ACCUMULO-1717:
---------------------------------------------

Probably not a good idea to run Accumulo (or Hadoop, for that matter) as 
root... or with any user with permissions for / or file:///

This might be a good sanity check for a bad config... on the other hand, it 
might be what the user wants. I'm not sure Accumulo should try to guess which 
is the case.

                
> accumulo should refuse to init or start with a directory of / (especially 
> file:///)
> -----------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-1717
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1717
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 1.6.0
>            Reporter: Steve Loughran
>
> Accumulo is  happy to init the root directory of a file system. It's hard to 
> see when this would ever be a good idea, especially if that filesystem is 
> file:/// . A sanity check to catch this -a sign of a bad configuration- would 
> stop accidentally damaging the filesystem

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