After upgrading to DevTest 10.8.4, observed that the first call made from any server to the Virtual Service upon Its restart, the call fails. Subsequent calls work with no errors.
This is happening for existing as well as new virtual services.
Inspection view was checked to see what the listen step events looked like, but there were none
DevTest 10.8.4
Windows 2019
External database is PostgreSQL.
Checked the VSE local properties file and found the following property was set:
lisa.vse.ssl.tcp.uses.nio=false
This means, for SSL VS, OLDIO is used
After commenting out property lisa.vse.ssl.tcp.uses.nio=false and restarting the VSE, issue was resolved. This will ensure NIO is enabled
NOTE: This will have to be done on all VSEs that have this property set to false.