Hi Amar, I just have tried. Everything worked as expected. I guess user A in your experiment was a superuser so that he could read anything.
Nicholas Sze /////// permission testing ////////////////////////////////////////// drwx-wx-wx - nicholas supergroup 0 2009-04-13 10:55 /temp drwx-w--w- - tsz supergroup 0 2009-04-13 10:58 /temp/test -rw-r--r-- 3 tsz supergroup 1366 2009-04-13 10:58 /temp/test/r.txt //login as nicholas (non-superuser) $ whoami nicholas $ ./bin/hadoop fs -lsr /temp drwx-w--w- - tsz supergroup 0 2009-04-13 10:58 /temp/test lsr: could not get get listing for 'hdfs://xxxx:9000/temp/test' : org.apache.hadoop.security.AccessControlException: Permission denied: user=nicholas, access=READ_EXECUTE, inode="test":tsz:supergroup:rwx-w--w- $ ./bin/hadoop fs -cat /temp/test/r.txt cat: org.apache.hadoop.security.AccessControlException: Permission denied: user=nicholas, access=EXECUTE, inode="test":tsz:supergroup:rwx-w--w- ----- Original Message ---- > From: Amar Kamat <ama...@yahoo-inc.com> > To: core-user@hadoop.apache.org > Sent: Monday, April 13, 2009 2:02:24 AM > Subject: Doubt regarding permissions > > Hey, I tried the following : > > - created a dir temp for user A and permission 733 > > - created a dir temp/test for user B and permission 722 > > - - created a file temp/test/test.txt for user B and permission722 > > > > Now in HDFS, user A can list as well as read the contents of file > temp/test/test.txt while on my RHEL box I cant. Is it a feature or a > bug. Can someone please try this out and confirm? > > > > Thanks > > Amar
