Hi,
I have two NFS servers that appear to have the same issue. They're
both Fedora 25 based and none of the clients can connect while
retrying to infinity. If I restart the server it works for a little
before the same thing happening.
Turning on debugging shows the following:
[171565.851530] svc: socket ffff940c3a5ef000(inet ffff940d7db626c0), busy=1
[171566.026535] svc: socket ffff940d7ac0c000(inet ffff940d7db87440), busy=1
[171570.032880] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
[171576.915841] svc: socket ffff94143ce1d000(inet ffff940d7db62e80), busy=1
[171578.360395] svc: socket ffff94128bba4000(inet ffff940d999b8f80), busy=1
[171578.828178] svc: socket ffff94143919b000(inet ffff940d7db83640), busy=1
[171578.828198] svc: socket ffff94143919b000(inet ffff940d7db83640), busy=1
[171579.930641] svc: socket ffff940d89e71000(inet ffff940d999b8000), busy=1
[171579.930662] svc: socket ffff940d89e71000(inet ffff940d999b8000), busy=1
[171579.930680] svc: socket ffff940d89e71000(inet ffff940d999b8000), busy=1
[171580.024655] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
[171580.913639] svc: socket ffff940d3f539000(inet ffff940d7db65d00), busy=1
[171582.400198] NFSD: laundromat service - starting
[171582.400202] NFSD: laundromat_main - sleeping for 90 seconds
[171589.539121] svc: socket ffff940ac592d000(inet ffff940d97b55540), busy=1
[171589.539284] svc: socket ffff940ac592d000(inet ffff940d97b55540), busy=1
[171590.040366] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
[171590.591191] svc: socket ffff94128bba1000(inet ffff940d7db607c0), busy=1
[171598.027702] svc: socket ffff94143919b000(inet ffff940d7db83640), busy=1
[171599.863801] svc: socket ffff94128bba4000(inet ffff940d999b8f80), busy=1
[171599.863836] svc: socket ffff94128bba4000(inet ffff940d999b8f80), busy=1
[171600.056109] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
[171604.354706] svc: socket ffff940ac592d000(inet ffff940d97b55540), busy=1
[171608.585185] svc: socket ffff94057a6da000(inet ffff940d999bdd00), busy=1
[171609.498365] svc: socket ffff940c3a5ef000(inet ffff940d7db626c0), busy=1
[171609.790704] svc: socket ffff94128bba1000(inet ffff940d7db607c0), busy=1
[171610.071868] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
[171616.141902] svc: socket ffff940d7ac08000(inet ffff940d7db81f00), busy=1
[171620.055620] svc: socket ffff940d9c253000(inet ffff940d999b9f00), busy=1
Then there is a single nfsd process that has a very high load:
# cat /proc/4192/stack
[<ffffffffffffffff>] 0xffffffffffffffff
# rpcinfo
program version netid address service owner
100000 4 tcp6 ::.0.111 portmapper superuser
100000 3 tcp6 ::.0.111 portmapper superuser
100000 4 udp6 ::.0.111 portmapper superuser
100000 3 udp6 ::.0.111 portmapper superuser
100000 4 tcp 0.0.0.0.0.111 portmapper superuser
100000 3 tcp 0.0.0.0.0.111 portmapper superuser
100000 2 tcp 0.0.0.0.0.111 portmapper superuser
100000 4 udp 0.0.0.0.0.111 portmapper superuser
100000 3 udp 0.0.0.0.0.111 portmapper superuser
100000 2 udp 0.0.0.0.0.111 portmapper superuser
100000 4 local /run/rpcbind.sock portmapper superuser
100000 3 local /run/rpcbind.sock portmapper superuser
100024 1 udp 0.0.0.0.131.70 status 29
100024 1 tcp 0.0.0.0.221.245 status 29
100024 1 udp6 ::.170.79 status 29
100024 1 tcp6 ::.143.15 status 29
100005 1 udp 0.0.0.0.78.80 mountd superuser
100005 1 tcp 0.0.0.0.78.80 mountd superuser
100005 1 udp6 ::.78.80 mountd superuser
100005 1 tcp6 ::.78.80 mountd superuser
100005 2 udp 0.0.0.0.78.80 mountd superuser
100005 2 tcp 0.0.0.0.78.80 mountd superuser
100005 2 udp6 ::.78.80 mountd superuser
100005 2 tcp6 ::.78.80 mountd superuser
100005 3 udp 0.0.0.0.78.80 mountd superuser
100005 3 tcp 0.0.0.0.78.80 mountd superuser
100005 3 udp6 ::.78.80 mountd superuser
100005 3 tcp6 ::.78.80 mountd superuser
100003 3 tcp 0.0.0.0.8.1 nfs superuser
100003 4 tcp 0.0.0.0.8.1 nfs superuser
100227 3 tcp 0.0.0.0.8.1 nfs_acl superuser
100003 3 udp 0.0.0.0.8.1 nfs superuser
100227 3 udp 0.0.0.0.8.1 nfs_acl superuser
100003 3 tcp6 ::.8.1 nfs superuser
100003 4 tcp6 ::.8.1 nfs superuser
100227 3 tcp6 ::.8.1 nfs_acl superuser
100003 3 udp6 ::.8.1 nfs superuser
100227 3 udp6 ::.8.1 nfs_acl superuser
100021 1 udp 0.0.0.0.231.220 nlockmgr superuser
100021 3 udp 0.0.0.0.231.220 nlockmgr superuser
100021 4 udp 0.0.0.0.231.220 nlockmgr superuser
100021 1 tcp 0.0.0.0.145.133 nlockmgr superuser
100021 3 tcp 0.0.0.0.145.133 nlockmgr superuser
100021 4 tcp 0.0.0.0.145.133 nlockmgr superuser
100021 1 udp6 ::.188.96 nlockmgr superuser
100021 3 udp6 ::.188.96 nlockmgr superuser
100021 4 udp6 ::.188.96 nlockmgr superuser
100021 1 tcp6 ::.173.23 nlockmgr superuser
100021 3 tcp6 ::.173.23 nlockmgr superuser
100021 4 tcp6 ::.173.23 nlockmgr superuser
And all the clients are trying to reconnect:
nfs: server elkpinfnas03.corp.vibes.com OK
nfs: server elkpinfnas03.corp.vibes.com OK
nfs: server elkpinfnas03.corp.vibes.com not responding, still trying
Any help would be greatly appreciated. Thank you.
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