I just got a issue with my Ubuntu VM, all starts from few days back I changed the MTU value for the default eth0, then I cannot use "netstat" anymore. Issued a netstat command will never return any output and after few mins the server hang with 99-100% CPU.
Today I tried to fix this issue by myself and somehow the SSH doesn't connect anymore, tried to Restart the VM from Azure portal doesn't work, then I hit the Stop, waited a few mins and Start the VM. The first try with SSH after the reset can be connected, then issued a htop to check the system status, after like 1 min, the screen hang again, and no SSH can be done to this VM. Another reset can do the trick, but will hang again since the netstat application still consumed 100% CPU... Don't know why.
Any help with this issue? Since I don't have any serial console configured for this VM, now with Performance diagnostics option, the Running performance diagnostics job running forever...
Thanks in advance.