Like Amar said. Try adding <property> <name>dfs.permissions</name> <value>false</value> </property>
to your conf/hadoop-site.xml file (or flip the value in hadoop-default.xml), restart your daemons and give it a whirl. cheers, -jw On Wed, Feb 11, 2009 at 8:44 PM, Amar Kamat <ama...@yahoo-inc.com> wrote: > bjday wrote: > >> Good morning everyone, >> >> I have a question about correct setup for hadoop. I have 14 Dell >> computers in a lab. Each connected to the internet and each independent of >> each other. All run CentOS. Logins are handled by NIS. If userA logs into >> the master and starts the daemons and UserB logs into the master and wants >> to run a job while the daemons from UserA are still running the following >> error occurs: >> >> copyFromLocal: org.apache.hadoop.security.AccessControlException: >> Permission denied: user=UserB, access=WRITE, >> inode="user":UserA:supergroup:rwxr-xr-x >> > Looks like one of your files (input or output) is of different user. Seems > like your DFS has permissions enabled. If you dont require permissions then > disable it else make sure that the input/output paths are under your > permission (/user/userB is the hone directory for userB). > Amar > > >> what needs to be changed to allow UserB-UserZ to run their jobs? Does >> there need to be a local user the everyone logs into as and run from there? >> Should Hadoop be ran in an actual cluster instead of independent computers? >> Any ideas what is the correct configuration settings that allow it? >> >> I followed Ravi Phulari suggestions and followed: >> >> http://hadoop.apache.org/core/docs/current/quickstart.html >> >> http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_(Multi-Node_Cluster)< >> http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_%28Multi-Node_Cluster%29> >> >> >> http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_(Single-Node_Cluster)< >> http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_%28Single-Node_Cluster%29> >> >> >> These allowed me to get Hadoop running on the 14 computers when I login >> and everything works fine, thank you Ravi. The problem occurs when >> additional people attempt to run jobs simultaneously. >> >> Thank you, >> >> Brian >> >> >
