Hi Nicholas, Thanks it helped. I gave permission 777 for /user So now user "Test" can perform HDFS operations.
And also I gave permission 777 for /usr/local/hadoop/datastore on the master. When user "Test" tries to submit the MapReduce job, getting this error Exception in thread "main" org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.fs.permission.AccessControlException: Permission denied: user=test, access=WRITE, inode="datastore":hadoop:supergroup:rwxr-xr-x Where else I need to give permission so that user "Test" can submit jobs using jobtracker and Datanode started by user "hadoop". Thanks, Senthil -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 07, 2008 5:49 PM To: core-user@hadoop.apache.org Subject: Re: Hadoop Permission Problem Hi Senthil, Since the path "myapps" is relative, copyFromLocal will copy the file to the home directory, i.e. /user/Test/myapps in your case. If /user/Test doesn't not exist, it will first try to create it. You got AccessControlException because the permission of /user is 755. Hope this helps. Nicholas ----- Original Message ---- From: "Natarajan, Senthil" <[EMAIL PROTECTED]> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Sent: Wednesday, May 7, 2008 2:36:22 PM Subject: Hadoop Permission Problem Hi, My datanode and jobtracker are started by user "hadoop". And user "Test" needs to submit the job. So if the user "Test" copies file to HDFS, there is a permission error. /usr/local/hadoop/bin/hadoop dfs -copyFromLocal /home/Test/somefile.txt myapps copyFromLocal: org.apache.hadoop.fs.permission.AccessControlException: Permission denied: user=Test, access=WRITE, inode="user":hadoop:supergroup:rwxr-xr-x Could you please let me know how other users (other than hadoop) can access HDFS and then submit MapReduce jobs. Where to configure or what default configuration needs to be changed. Thanks, Senthil
