How to restart my socket activated service safely ?

[Francis Moreau <francis.moro@xxxxxxxxx>]

Hello,

During my application update, I want to restart my service which is
activated by a socket but want to be sure that no request sent to my
service will be missed. I also want to restart the socket too so
systemd uses the latest version of the socket unit file.

If I restart the socket when the service is still running then I get
an error message: "rotor.socket: Socket service rotor.service already
active, refusing."

If I stop the service first and restart the socket then there's a
short time frame where requests can be lost.

What is the recommended way to restart my service ?

Thank you in advance.
-- 
Francis
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