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POApache Pig permissions issue
 

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    <p>I'm attempting to get Apache Pig up and running on my Hadoop cluster, and am encountering a permissions problem. Pig itself is launching and connecting to the cluster just fine- from within the Pig shell, I can <code>ls</code> through and around my HDFS directories. However, when I try and actually load data and run Pig commands, I run into permissions-related errors:</p> <pre><code>grunt&gt; A = load 'all_annotated.txt' USING PigStorage() AS (id:long, text:chararray, lang:chararray); grunt&gt; DUMP A; 2011-08-24 18:11:40,961 [main] ERROR org.apache.pig.tools.grunt.Grunt - You don't have permission to perform the operation. Error from the server: org.apache.hadoop.security.AccessControlException: Permission denied: user=steven, access=WRITE, inode="":hadoop:supergroup:r-xr-xr-x 2011-08-24 18:11:40,977 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1066: Unable to open iterator for alias A Details at logfile: /Users/steven/Desktop/Hacking/hadoop/pig/pig-0.9.0/pig_1314230681326.log grunt&gt; </code></pre> <p>In this case, <code>all_annotated.txt</code> is a file in my HDFS home directory that I created, and most definitely have permissions to; the same problem occurs no matter what file I try to <code>load</code>. However, I don't think that's the problem, as the error itself indicates Pig is trying to <em>write</em> somewhere. Googling around, I found a few mailing list posts suggesting that certain Pig Latin statements (<code>order</code>, etc.) need write access to a temporary directory on the HDFS file system whose location is controlled by the <code>hadoop.tmp.dir</code> property in hdfsd-site.xml. I don't <em>think</em> <code>load</code> falls into that category, but just to be sure, I changed <code>hadoop.tmp.dir</code> to point to a directory within my HDFS home directory, and the problem persisted.</p> <p>So, anybody out there have any ideas as to what might be going on?</p>
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