nfsroot error

From: K.Choi (kchoi_at_ihanyang.ac.kr)
Date: 04/30/04 

Date: Fri, 30 Apr 2004 09:42:10 +0900 (KST)

I had used beowulf linux cluster system with Debian GNU/Linux (woody).
But last week, I had updated it to sarge for some libraries and met a
serious problem.

NFSROOT does not work.

When diskless node boot and try mount root file syste on nfs server,
it failed. But if I try mount that directory from another system, it
succese. /var/log/syslog file note below,

==
Apr 30 09:37:49 van rpc.mountd: authenticated mount request from
node8:800 for /tftpboot/192.168.42.8 (/tftpboot/192.168.42.8)
==

and stop. There is no more message and diskless node boot fail. But
if I try from another system,

==
Apr 30 09:37:58 van rpc.mountd: authenticated mount request from
B612:892 for /tftpboot/192.168.42.8 (/tftpboot/192.168.42.8)
Apr 30 09:37:59 van rpc.mountd: authenticated mount request from
B612:896 for /tftpboot/192.168.42.8 (/tftpboot/192.168.42.8)
==

and I could access the mounted directory. My linux kernel has no
problem.(In my opinion.) This is a part of NFS on my kernel set.

#
# Network File Systems
#
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_ROOT_NFS=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=y
CONFIG_SUNRPC=y

...and I thisnk there is no wrong configuration and make a netboot
kernel image from this kernel by mknbi-linux.

I don't know what is the problem. Any ideas? 

-- 
Sincerely, Ki-young