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A duplicate machine with the same /etc/hostid as another one will screw up NFSv4 really badly. rick ________________________________________ From: owner-freebsd-stable@freebsd.org o= n behalf of Peter Sent: Saturday, July 16, 2022 8:06 AM To: freebsd-stable@freebsd.org Subject: nfs stalls client: nfsrv_cache_session: no session CAUTION: This email originated from outside of the University of Guelph. Do= not click links or open attachments unless you recognize the sender and kn= ow the content is safe. If in doubt, forward suspicious emails to IThelp@uo= guelph.ca Hija, I have a problem with NFSv4: The configuration: Server Rel. 13.1-RC2 nfs_server_enable=3D"YES" nfs_server_flags=3D"-u -t --minthreads 2 --maxthreads 20 -h ..." mountd_enable=3D"YES" mountd_flags=3D"-S -p 803 -h ..." rpc_lockd_enable=3D"YES" rpc_lockd_flags=3D"-h ..." rpc_statd_enable=3D"YES" rpc_statd_flags=3D"-h ..." rpcbind_enable=3D"YES" rpcbind_flags=3D"-h ..." nfsv4_server_enable=3D"YES" sysctl vfs.nfs.enable_uidtostring=3D1 sysctl vfs.nfsd.enable_stringtouid=3D1 Client bhyve Rel. 13.1-RELEASE on the same system nfs_client_enable=3D"YES" nfs_access_cache=3D"600" nfs_bufpackets=3D"32" nfscbd_enable=3D"YES" Mount-options: nfsv4,readahead=3D1,rw,async Access to the share suddenly stalled. Server reports this in messages, every second: nfsrv_cache_session: no session IPaddr=3D192.168... Restarting nfsd and mountd didn't help, only now the client started to also report in messages, every second: nfs server 192.168...:/var/sysup/mnt/tmp.6.56160: is alive again Mounting the same share anew to a different place works fine. The network babble is this, every second: NFS request xid 1678997001 212 getattr fh 0,6/2 NFS reply xid 1678997001 reply ok 52 getattr ERROR: unk 10052 Forensics: I tried to build openoffice on that share, a couple of times. So there was a bit of traffic, and some things may have overflown. There seems to be no way to recover, only crashing the client.