Hey Corbett, We prevent overriding user.name. We instead provide secure impersonation (does not require kerberos, don't be fooled by its name), which is documented at http://hadoop.apache.org/common/docs/stable/Secure_Impersonation.html. This should let you do what you're attempting to, in a more controlled fashion.
On Wed, Jul 18, 2012 at 10:22 PM, Corbett Martin <comar...@nhin.com> wrote: > Hello > > I'm new to Hadoop and I'm trying to do something I *think* should be easy but > having some trouble. Here's the details. > > 1. I'm running Hadoop version 1.0.2 > 2. I have a 2 Node Hadoop Cluster up and running, with no security enabled > > I'm having trouble overriding the username from the client so that the > files/directories created are owned by the user I specify from the client. > > For example I'm trying to run: > > hadoop fs -Duser.name=someUserName -conf hadoop-cluster.xml -mkdir > /user/someOtherUserName/test > > And have the directory "test" created in hdfs and owned by "someUserName". > Instead it is creating the directory and giving it the owner of the user > (whoami) from the client. I'd like to override or control that…can someone > tell me how? > > My hadoop-cluster.xml file on the client looks like this: > > <?xml version="1.0"?> > <configuration> > > <property> > <name>fs.default.name</name> > <value>hdfs://server1:54310</value> > </property> > > <property> > <name>mapred.job.tracker</name> > <value>server1:54311</value> > </property> > > </configuration> > > Thanks for the help > > This message and its contents (to include attachments) are the property of > National Health Systems, Inc. and may contain confidential and proprietary > information. This email and any files transmitted with it are intended solely > for the use of the individual or entity to whom they are addressed. You are > hereby notified that any unauthorized disclosure, copying, or distribution of > this message, or the taking of any unauthorized action based on information > contained herein is strictly prohibited. Unauthorized use of information > contained herein may subject you to civil and criminal prosecution and > penalties. If you are not the intended recipient, you should delete this > message immediately and notify the sender immediately by telephone or by > replying to this transmission. -- Harsh J
