We also tried adding these to the Agentry.ini on the development SMP install.
[Server]
inactiveTimeout=600
[ANGEL Front End]
timeout=300
We set them to 7200 each. These settings used to be in the Agentry.ini before moving to SMP. 600 and 300 are the default values. What is interesting is the timeout=300 is the default socket timeout. That means in the agentry code the socket would be closed after 300 seconds or 5 minutes of inactivity. This is what seems to be happening. The inactiveTimeout seems to have been moved into the SMP cockpit, but this socket timeout is missing.
Putting these in the agentry.ini did not result in any change.