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From "Zheng, Kai" <kai.zh...@intel.com>
Subject Not sure Kerberos principal needs a Linux user account
Date Thu, 18 Oct 2012 00:38:25 GMT
Sorry, may I resend the message with a subject, just forgot it.


When Kerberos authentication is used instead of the default "simple" method, is a Linux user
account needed to run a MapReduce job for a principal? Why?
For example, for a Kerberos principal "john@whatever-company.com<mailto:john@whatever-company.com>",
if he needs to run a job, is the following step 1) & 2)  a must?

1)      Create a Linux user "john" (the first component of the principal name);

2)      The user logins as "john" into Linux shell;

3)      kinit john@whatever-company.com<mailto:john@whatever-company.com>;

4)      run MapReduce job


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