I've been running ESXi 6.5 free for awhile and everything was fine, and recently I updated to 6.7.0 (Build 9484548). Since then my Ubuntu 16.04 VMs freeze (no response via ssh, the console for the VM does not respond to keystrokes--it's just frozen, CPU for the VM is flat-lined at 100%). This occurs intermittently--anywhere between once or twice a week to a few times a day. The VMs with more network traffic (my backup VM in particular which obviously has the most traffic) freeze more frequently. As far as I can tell there are no logs on the Ubuntu VM related to the crash. I'm using the VMXNET3 adapter for everything. I did find some articles online about people having a similar issue after updating to 6.5 but it was fixed in a later update.
All my Ubuntu VMs are running open-vm-tools
All my VMs are up to date with apt update, apt-upgrade
Hardware is X10SDV-TLN4F, Xeon D-1540
About the only thing I have tried is:
esxcli system settings advanced set -o /Net/Vmxnet3HwLRO -i 0
(which had no effect)
If anyone could point me in the right direction to troubleshoot this please let me know.
Thanks.