NIS Master and Client problem

UNIX HP-UX
1

I have a NIS Master server and NIS Clients.
But when I started the service all the process and files that should be owne by root apper by the owner 0

This is an example

0 1709 1708 0 10:06:10 ? 0:00 /usr/sbin/nfsd 4
0 1710 1709 0 10:06:10 ? 0:00 /usr/sbin/nfsd 4
0 1708 1 0 10:06:10 ? 0:00 /usr/sbin/nfsd 4
 
-rw------- 1 0 sys 2862 Oct 14 2007 .ICEauthority
-rw------- 1 0 sys 228 Oct 14 2007 .TTauthority
-rw------- 1 0 sys 402 Oct 14 2007 .Xauthority

If I stop nis.master and nis.client all the process everything come back to root (as the user not the number 0)

Anyone have an idea??
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2

Assuming ypwhich returns the expected NIS server, does this problem just occur for files owned by root or for all users?

3

just for root

I looks that it was a problem with the 2nd line on the /etc/passwd on the master. It was deleted and everything came back to root
root:FxuOpg9A:0:3::/:/sbin/sh
droot:R6TEgWb7FU:0:3::/:/sbin/sh ---- line deleted

thanks