I have the same problem. Here is the data of my host.
/proc/self/mountinfo :
20 25 0:19 / /sys rw,nosuid,nodev,noexec,relatime shared:7 - sysfs sysfs rw
21 25 0:4 / /proc rw,nosuid,nodev,noexec,relatime shared:12 - proc proc rw
22 25 0:6 / /dev rw,nosuid,relatime shared:2 - devtmpfs udev
rw,size=16437880k,nr_inodes=4109470,mode=755
23 22 0:20 / /dev/pts rw,nosuid,noexec,relatime shared:3 - devpts devpts
rw,gid=5,mode=620,ptmxmode=000
24 25 0:21 / /run rw,nosuid,noexec,relatime shared:5 - tmpfs tmpfs
rw,size=3290532k,mode=755
25 0 259:2 / / rw,noatime shared:1 - ext4 /dev/md0p3 rw,data=ordered
26 20 0:7 / /sys/kernel/security rw,nosuid,nodev,noexec,relatime shared:8 -
securityfs securityfs rw
27 22 0:22 / /dev/shm rw,nosuid,nodev shared:4 - tmpfs tmpfs rw
28 24 0:23 / /run/lock rw,nosuid,nodev,noexec,relatime shared:6 - tmpfs tmpfs
rw,size=5120k
29 20 0:24 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:9 - tmpfs tmpfs
ro,mode=755
30 29 0:25 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 -
cgroup cgroup
rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd
31 20 0:26 / /sys/fs/pstore rw,nosuid,nodev,noexec,relatime shared:11 - pstore
pstore rw
32 29 0:27 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime
shared:13 - cgroup cgroup rw,net_cls,net_prio
33 29 0:28 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:14 -
cgroup cgroup rw,freezer
34 29 0:29 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:15 -
cgroup cgroup rw,devices
35 29 0:30 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime
shared:16 - cgroup cgroup rw,perf_event
36 29 0:31 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime
shared:17 - cgroup cgroup rw,cpu,cpuacct
37 29 0:32 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:18 -
cgroup cgroup rw,memory
38 29 0:33 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:19 -
cgroup cgroup rw,blkio
39 29 0:34 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:20 -
cgroup cgroup rw,cpuset,clone_children
40 29 0:35 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime shared:21 -
cgroup cgroup rw,pids
41 20 0:8 / /sys/kernel/debug rw,relatime shared:22 - debugfs debugfs rw
42 22 0:36 / /dev/hugepages rw,relatime shared:23 - hugetlbfs hugetlbfs
rw,pagesize=2M
43 24 0:37 / /run/rpc_pipefs rw,relatime shared:24 - rpc_pipefs sunrpc rw
44 22 0:18 / /dev/mqueue rw,relatime shared:25 - mqueue mqueue rw
45 21 0:38 / /proc/sys/fs/binfmt_misc rw,relatime shared:26 - autofs systemd-1
rw,fd=41,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=287
74 25 0:40 / /tmp rw,nosuid,nodev,relatime shared:27 - tmpfs tmpfs
rw,size=2097152k
76 25 8:19 / /local rw,noatime shared:28 - ext4 /dev/sdb3
rw,discard,data=ordered
78 25 259:3 / /export rw,noatime shared:29 - ext4 /dev/md0p4 rw,data=ordered
80 45 0:41 / /proc/sys/fs/binfmt_misc rw,relatime shared:30 - binfmt_misc
binfmt_misc rw
209 25 0:44 / /data rw,noatime shared:153 - nfs4 nfs-data:/space/data
rw,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.16.97.128,local_lock=none,addr=172.16.96.205
208 25 0:44 / /home rw,noatime shared:157 - nfs4 nfs-data:/space/home
rw,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.16.97.128,local_lock=none,addr=172.16.96.205
210 24 0:43 / /run/user/123 rw,nosuid,nodev,relatime shared:162 - tmpfs tmpfs
rw,size=3290528k,mode=700,uid=123,gid=133
156 24 0:42 / /run/user/6502 rw,nosuid,nodev,relatime shared:102 - tmpfs tmpfs
rw,size=3290528k,mode=700,uid=6502,gid=100
250 20 0:47 / /sys/fs/fuse/connections rw,relatime shared:142 - fusectl fusectl
rw
Please note the NFS mount of /home.
# host nfs-data
nfs-data.ac.example.de is an alias for nasl006.ac.example.de.
nasl006.ac.example.de has address 172.19.96.205
Here is /etc/network/interfaces:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet static
address 172.16.97.128
netmask 255.255.240.0
gateway 172.16.96.1
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 172.16.96.124 172.16.96.123
dns-search ac.example.de. vs.example.de. public.example.de.
dmz.example.de. example.de.
iface br0 inet6 static
address 2001:db8:30:60::180
netmask 64
gateway 2001:db8:30:60::1
privext 2
Please increase the priority of this bug report. Cutting off the
network connections can result in lost data, in case of pending NFS
writes.
Regards
Harri
