[Nut-upsuser] FreeBSD 6.1, MGE Ellipse ASR600USBS, newhidups & upsd

Arjen de Korte nut+users at de-korte.org
Fri Nov 24 17:11:07 CET 2006

> I still see occasional loss of connections, but things seem to work a lot
> better in 2.1.

I have noticed that too. The UPSes I monitor (via serial interface) lose
connection every couple of days (random) and reconnect almost immediately.
I suspect that this is due to a glitch in the PING/PONG between upsd and
driver. Currently, the server is not really robust in this aspect, since
right after retrying to PING a driver (if it failed to respond the first
time), it will be declared stale (without allowing it time to reply). This
needs to be changed, so that there is time to retry at least once allowing
enough time for processing it without declaring the driver stale.

Best regards, Arjen
Eindhoven - The Netherlands
Key fingerprint - 66 4E 03 2C 9D B5 CB 9B  7A FE 7E C1 EE 88 BC 57

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