nfs mounting - pam considerations

[Margaret Doll]

I have a one system that is FC3.  I am having trouble keeping its  
partitions mounted on a couple of other FC2 systems.   The partitions  
from the FC3 system are mounted for several days on the FC2 systems.   
Then they appear  as

FC3system:/mount1	-	-	-	-	/mountpoint


  The FC2 systems report  in  messages :  "RPC:  error 5 connecting  
to server FC3"  .

I can unmount the FC3 partitions on the FC2 systems, but I cannot  
remount them afterwards.

mount to NFS server  "FC3system"  failed:  server is down.

This occurs after I have used

service nfs restart
exportfs -a

on the FC3 server to make sure it is awake.


On the  FC3 server side,  I am getting the errors in /var/log/messages

conrd(pam-unix)[23946]:  session closed for  user root

twice every ten minutes.


Is  Fedora 3 a bad system?  Or is there a fix to the problem above.