Having problems migrating home directories from old server in Debian 8 jessie to new one with Debian 9 stretch
home directories are shared over nfs to several workstations. This has worked well for several years over different versions of debian on several physical and virtual servers.
Now, migrating to a new (physical) machine with bare stretch install and home on bare ext4 partition, no raid, no lvm, no nothing.
nfs configurations is the same on both machines. Default from install with the same exports line on both.
With Debian 9 everything works fine and fast except Firefox and Thunderbird complaining about 'file already in use' (for all users).
Client workstations are the same, just
umount one server,
mount the other and see the difference. Rebooting either workstation, server or both makes no difference.
Any idea of where to look?
In case it might be of help:
stretch:/home on /home type nfs (rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=X.X.X.X,mountvers=3,mountport=59929,mountproto=udp,local_lock=none,addr=X.X.X.X) jessie:/home on /home type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=X.X.X.X,mountvers=3,mountport=34380,mountproto=udp,local_lock=none,addr=X.X.X.X)