The user through which you are trying to run the task should jave permission on hdfs. just verify that
*Thanks & Regards * ∞ Shashwat Shriparv On Sat, May 11, 2013 at 1:02 AM, Amal G Jose <[email protected]> wrote: > After starting the hdfs, ie NN, SN and DN, create an hdfs directory > structure in the form /<hadoop.tmp.dir>/mapred/staging. > Then give 777 permission to staging. After that change the ownership of > mapred directory to mapred user. > After doing this start jobtracker, it will start. Otherwise, it will not > start. > The reason for not showing any datanodes may be due to firewall. Check > whether the necessary ports are open. > > > > On Tue, Apr 30, 2013 at 2:28 AM, <[email protected]> wrote: > >> I look in the name node log and I get the following errors: >> >> 2013-04-29 15:25:11,646 ERROR >> org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException >> as:mapred (auth:SIMPLE) >> cause:org.apache.hadoop.security.AccessControlException: Permission denied: >> *user=mapred*, access=WRITE, inode="/":hdfs:supergroup:drwxr-xr-x >> >> 2013-04-29 15:25:11,646 INFO org.apache.hadoop.ipc.Server: IPC Server >> handler 6 on 9000, call >> org.apache.hadoop.hdfs.protocol.ClientProtocol.mkdirs from >> 172.16.26.68:45044: error: >> org.apache.hadoop.security.AccessControlException: Permission denied: * >> user=mapred*, access=WRITE, inode="/":hdfs:supergroup:drwxr-xr-x >> org.apache.hadoop.security.AccessControlException: Permission denied: * >> user=mapred,* access=WRITE, inode="/":hdfs:supergroup:drwxr-xr-x >> at >> org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:205) >> at >> org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:186) >> >> When I create the file system I have the user hdfs on the root folder. >> (/). I am not sure now to have both the user mapred and hdfs have access to >> the root (which it seems these errors are indicating). >> >> I get a page from 50070 put when I try to browse the filesystem from the >> web UI I get an error that there are no nodes listening (I have 3 data >> nodes and 1 namenode). The browser indicates that there is nothing >> listening to port 50030, so it seems that the JobTracker is not up. >> > >
