Before upgrade, there are LI logging server(s) configured and liagent service is running on the manager and edge nodes. Observed the LI logging server(s) are sill there, but liagent service is stopped on the manager and edge node after upgrade.
VMware NSX, VMware NSX-T Data Center
This is an expected behaviour
Start liagent service manually after upgrade by using cmd: "/etc/init.d/liagentd start" or run command "start service liagent" from NSX cli.
This issue is resolved in 4.2.1