LinuxQuestions.org - strange! can't use auto.nis as the file name for autofs service

hi, guys, I find a very strange stuff in both CentOS and RHEL 5.1 (32bit, installed in VMware workstation):
the same content (as below) in /etc/auto.nis and /etc/auto.test

Code:

#

# $Id: auto.misc,v 1.2 2003/09/29 08:22:35 raven Exp $

#

# This is an automounter map and it has the following format

# key [ -mount-options-separated-by-comma ] location

# Details may be found in the autofs(5) manpage



#cd            -fstype=iso9660,ro,nosuid,nodev :/dev/cdrom

*              -rw,soft        server:/home/&



# the following entries are samples to pique your imagination

#linux          -ro,soft,intr          ftp.example.org:/pub/linux

#boot          -fstype=ext2            :/dev/hda1

#floppy        -fstype=auto            :/dev/fd0

#floppy        -fstype=ext2            :/dev/fd0

#e2floppy      -fstype=ext2            :/dev/fd0

#jaz            -fstype=ext2            :/dev/sdc1

#removable      -fstype=ext2            :/dev/hdd

when I use /etc/auto.nis in /etc/auto.master:

Code:

/home /etc/auto.nis --timeout=60

autofs doesn't work, but it works with /etc/auto.test or other suffix:

Code:

/home /etc/auto.test --timeout=60

anyone met the same problem as mine? Is it a bug or just I did sth. wrong?
anything reply with be welcome! thx