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From Adam Fuchs <>
Subject Re: Accumulo software and processes owner
Date Fri, 26 Apr 2013 20:53:31 GMT

To properly secure you Accumulo install it's important that the shared
secret in the Accumulo configs only be shared with the Accumulo processes,
so I would recommend using a separate accumulo user.

In HDFS you can create the directory that Accumulo writes to (/accumulo by
default) and then chown it to accumulo. That ought to get you started. If
trash is enabled in HDFS (fs.trash.interval set to something other than 0,
I believe) then you may also have to create the accumulo home directory in
hdfs and chown that as well.

 On Apr 26, 2013 4:36 PM, "Terry P." <> wrote:

> I just finished setting up an 8-node cluster using Cloudera CDH3u5 and
> Accumulo 1.4.2.  The Cloudera rpm installations created the hdfs Linux user
> and hadoop group (and others).  I initially created an accumulo Linux user
> and set it as the owner of the Accumulo software.
> However, after HDFS was up and running, when I attempted to start Accumulo
> as the accumulo Linux user, I of course got HDFS permission denied when it
> tried to write to HDFS.  Being a newbie, I didn't bother figuring out how
> to grant HDFS permissions to the accumulo account, I just started Accumulo
> as the hdfs user so I could get things rolling.
> As what user does one normally start Accumulo?  hdfs?  Linux root?  The
> Accumulo User Manual never recommends anything about who the Accumulo
> binaries should be owned by or what account it should be run under (e.g.
> root, or an accumulo Linux account).
> Thanks in advance,
> Terry

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