I am currently running Jenkins 2.138.3 with plugin version 3.12, I am attempting to upgrade to Jenkins 2.182 and plugin 3.17.
Looks like I am getting an error that it can't connect to port 50000 (the fixed agent port). I attached the verbose logs.
When I do a curl from the slave to the master I see 50000 is available.
Any ideas would be appreciated, I am currently just downgrading Jenkins to previous versions to see if that will help.