My environment:
I have three servers in my studio. Server A is an NFS server, server B and C are NFS clients.
Server B and C mount A:/raid/data on local /data. SELinux is disabled, ufw is not installed, iptables is default. And there is a layer-2 switch without any connection limit to the three servers.
What I found:
This morning I tried to execute ls /data on server B, and after about 5 mins, there was not any output.
When I connected to server C, and tried to execute ls /data, it worked normally.
What I tried:
I executed the commands listed above, and all of them were stuck without any output.
df -Th
df
ls /
fuser -m -v /data
I tried to execute umount -f /data, it said device is busy.
I tried ping server A on server B, it responded with low latency.
What I need:
Is there any solution which doesn't involve rebooting the server? And what causes this problem? How can I avoid it?
0 Answers