Whats really needed is the mount arguments from the clients (the machines that have mounted the shared exports and are locking up) and the software versions from the NFS servers (the machines that are exporting files via NFS).
Specifically on the server it would help to see this on the servers:
apt-cache policy nfs-kernel-server
uname -a
ifconfig -a
Anything that will help build a solid repeatable test case.
Thanks guys for providing some more details.
Whats really needed is the mount arguments from the clients (the machines that have mounted the shared exports and are locking up) and the software versions from the NFS servers (the machines that are exporting files via NFS).
Specifically on the server it would help to see this on the servers:
apt-cache policy nfs-kernel-server
uname -a
ifconfig -a
Anything that will help build a solid repeatable test case.