NFS4 problem

[Gonçalo Borges]

Dear NFS4 experts,
I'm having a problem with NFS4 running under Scientific Linux, or in 
other words, Red-Hat Enterprise.
If this is not the correct mailing list to post my problem, please point 
me out to the correct one.

NFS4 is installed in the following machines/kernels:

CLIENT:
[root at lflip23 ~]# uname -a
Linux lflip23.lip.pt 2.6.17.6 #1 SMP Fri Jul 21 15:20:33 WEST 2006 i686 
athlon i386 GNU/Linux

SERVER:
[root at ce02 ~]# uname -a
Linux ce02.lip.pt 2.6.17.6 #1 SMP Thu Jul 20 14:00:39 WEST 2006 i686 
athlon i386 GNU/Linux

These are the nfs versions which are installed in both machines:

[root at ce02 ~]# rpm -qa | grep portmap
portmap-4.0-63
[root at ce02 ~]# rpm -qa | grep nfs
system-config-nfs-1.2.8-1
nfs-utils-1.0.6-65.EL4

The problem is the following:
- After rebooting the CLIENT, the shared directories (/exp-soft and 
/usr/local/sge/utils_scripts) are completely accessible from the CLIENT 
machine:

[root at lflip23 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            239326844   6151812 221017848   3% /
none                   1035244         0   1035244   0% /dev/shm
ce02.lip.pt:/usr/local/sge/utils_scripts
                     239326848   5772896 221396768   3% 
/usr/local/sge/utils_scripts
ce02.lip.pt:/exp-soft
                     239326848   5772896 221396768   3% /exp-soft


- At the end of the day, the shared directories are not available 
anymore from the client CLIENT:

[root at lflip23 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            239326844   6151812 221017848   3% /
none                   1035244         0   1035244   0% /dev/shm
( HANGS FOREVER !!!... )

I do not see anything in the logs. Nevertheless, if I run "dmesg", this 
is what I've got:

(...)
nfs: server ce02.lip.pt not responding, still trying
nfs: server ce02.lip.pt not responding, still trying
nfs: server ce02.lip.pt not responding, still trying
(...)

I have tried to unmount the shared directories in the CLIENT, restart 
the deamons and mount the directories again.
Nevertheless, the problem persists:

[root at lflip23 ~]# umount -l /usr/local/sge/utils_scripts
[root at lflip23 ~]# umount -l /exp-soft
[root at lflip23 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            239326844   6151832 221017828   3% /
none                   1035244         0   1035244   0% /dev/shm
[root at lflip23 ~]# /etc/init.d/nfslock stop
Stopping NFS statd:                                        [FAILED]
[root at lflip23 ~]# /etc/init.d/nfs stop
Shutting down NFS mountd:                                  [FAILED]
Shutting down NFS daemon:                                  [FAILED]
Shutting down NFS quotas:                                  [FAILED]
Shutting down NFS services:                                [  OK  ]
[root at lflip23 ~]# /etc/init.d/rpcgssd stop
[root at lflip23 ~]# /etc/init.d/rpcsvcgssd stop
[root at lflip23 ~]# /etc/init.d/portmap restart
Stopping portmap:                                          [  OK  ]
Starting portmap:                                          [  OK  ]
[root at lflip23 ~]# /etc/init.d/rpcidmapd restart
Shutting down RPC idmapd:                                  [  OK  ]
Starting RPC idmapd:                                       [  OK  ]
[root at lflip23 ~]# mount /usr/local/sge/utils_scripts
[root at lflip23 ~]# mount /exp-soft
[root at lflip23 ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1            239326844   6151840 221017820   3% /
none                   1035244         0   1035244   0% /dev/shm
(HANGS FOREVER !!!....)

Do you have any suggestions?

Thanks in advance
Cheers
Goncalo