John,
did you turn off App Nap?
Chip

On Wed, 24 Apr 2019 06:54:15 -0500, John DeSoi via 4D_Tech wrote:
> Since I upgraded from 16.4 to 17.1 (all Mac), users have been 
> complaining about 4D Client disconnects. Messages like:
> 
> "The current connection to the database has been disrupted. 
> Connection error with the server. Please restart the application."
> 
> "Unknown Error. Connection error with the server. Please restart the 
> application."
> 
> It is an all local single switch network with default timeouts. I 
> experimented with changing timeouts, but it did not help.
> 
> The server hardware also changed (new 2018 Mac Mini), so I'm looking 
> into that. One curious thing I noticed is the "Application Server" 
> tab shows it to be listening on two IP addresses: 192.168.X.X and 
> 169.254.X.X. The 192 address is expected and the only active network 
> connection on the computer. Why would the server be listening on a 
> 169 link-local address and where did that come from? I don't see that 
> when I run the server on my laptop under the same operating system 
> (10.14 Mojave).
> 
> Digging into it with Wireshark is next, but hoping someone might 
> suggest an easier path.
> 
> John DeSoi, Ph.D.
> 
> 
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