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From Elazar Leibovich <elaz...@gmail.com>
Subject Re: hadoop security
Date Fri, 22 Nov 2013 06:33:02 GMT
The reason you must use jsvc, is to start as root and then bind to
privilleged ports. Secure Datanode won't run on non privilleged port (i.e.

The advantages are, users on your machine cannot take this port and pretend
they're DN. Only root can.

Like you, I don't think this should be mandatory, but it is now.

On Mon, Nov 18, 2013 at 11:42 AM, lei liu <liulei412@gmail.com> wrote:

> When I use the hadoop security, I must use jsvc to start datanode. Why
> must use jsvc to start datanode? What are the advantages do that?
> Thanks,
> LiuLei

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