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https://issues.apache.org/jira/browse/HADOOP-9482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635068#comment-13635068
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Steve Loughran commented on HADOOP-9482:
----------------------------------------

I just grabbed that JIRA reference from the commit logs -HADOOP-8562 looks like 
the root cause. 

This also looks like an instance of HADOOP-9422: file creations calls 
{{chmod()}}, which uses shell, which failed.

Looking at the source (my local branch/fork for HADOOP-8545, not been rebased 
for a while), the IOE is thrown and then caught; a clean mvn install stops this 
problem re-occurring. I think my machine may have been contaminated by some 
other snapshot of the hadoop-common JAR. 
                
> regression: unable to create a file in the file:/// filesystem unless 
> HADOOP_HOME_DIR or hadoop.home.dir is set
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9482
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9482
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.0.5-beta
>            Reporter: Steve Loughran
>            Priority: Critical
>


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