Changing system time

[troutgoingupstream]

What would be the right course of action to refresh both server and client in a situation when I change the system time? We noticed a bunch of issues with that especially when moving backwards more than one hour.
We found out, that as a minimum we have to refresh all subscriptions on the client side, as opcua uses asyncio.sleep internally which waits for the original timestamp, and we didn’t get opc updated until the time „catched up” the original time.
But now we see
asyncua.server.uaprocessor: sending service fault response: The session cannot be used because ActivateSession has not been called. (BadSessionNotActivated)
error.
Is the complete server and all clients shutdown and restart an only option/walkaround right now to mitigate that?

[oroulet]

sounds like a bug. We are supposed to use utc time but that is not enough here. I suppose all internal sleep must be changed to use time.monotonic()
Why do you change the system time?
also PR welcome because I am really busy,,

[troutgoingupstream]

It’s on a device disconnected from the internet and without access to the local ntp server. Initial time set on this device might be wrong, so manual adjustment might be necessary.