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https://issues.apache.org/jira/browse/WHIRR-656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13457685#comment-13457685
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Steve Loughran commented on WHIRR-656:
--------------------------------------

This could also happen if the cluster coming up is v. small and there is a DN 
on the master node, as the block count could still be below the threshold.
                
> HDFS directory creation can deadlock if the cluster being brought up is 
> single node & preformatted 
> ---------------------------------------------------------------------------------------------------
>
>                 Key: WHIRR-656
>                 URL: https://issues.apache.org/jira/browse/WHIRR-656
>             Project: Whirr
>          Issue Type: Bug
>          Components: service/hadoop
>    Affects Versions: 0.9.0
>            Reporter: Steve Loughran
>            Priority: Minor
>
> If you have a single node cluster & there already exists a pre-formatted 
> filesystem then the cluster config process can deadlock in dfs directory 
> creation

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