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From stephen mulcahy <stephen.mulc...@deri.org>
Subject Re: Permissions needed to run RandomWriter ?
Date Tue, 30 Jun 2009 11:19:59 GMT

I think I've figured this out. It may be obvious to others, but the user 
I was trying to run the sort as didn't have write access to the 

I did the following

sudo adduser smulcahy hadoop
sudo chmod -R g+w /data1/hadoop-tmp/

and it seems to have started successfully now.

 From a configuration perspective, should dfs.permissions.supergroup 
default to 'hadoop' rather than supergroup? And should hadoop-tmp be 
created with default group-write access? Or is the hadoop group intended 
for other purposes (are there reasons why you might not want normal 
hadoop users being members of this group)?



Stephen Mulcahy, DI2, Digital Enterprise Research Institute,
NUI Galway, IDA Business Park, Lower Dangan, Galway, Ireland
http://di2.deri.ie    http://webstar.deri.ie    http://sindice.com

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