Enthusiastic logging when interface goes away

[Mark Deneen]

I'm guessing that your supervisor process, whether it be systemd, runit,
etc, is repeatedly starting unbound.  Unbound prints this error message,
exits, and then is launched again.


On Thu, Oct 4, 2018 at 10:34 AM Mike via Unbound-users <
unbound-users at nlnetlabs.nl> wrote:

>
> I use unbound as a resolver on my home network.  I've been very happy
> with how well it works.  Except in one area.
>
> Unbound seems to flood the log file when the network interface goes
> away, e.g., my ISP does some maintenance in the wee hours of the morning.
>
> The log records occur at a rate of about one THOUSAND per second.  When
> there's a 15 minute outage, ... well, that's a log of log records.
>
> Two questions:
>
> 1) Is there a configuration parameter that cools down unbound's
> enthusiasm for extreme logging rates?
>
> 2) More of a curiosity - what was the use case that cause this extreme
> logging rate to be coded into unbound?
>
>
>
> What I'd prefer to see would be something along the lines of:
>
> - a log record when the problem initially occurs
> - a log record every minute or so as the problem persists
> - a log record showing that the problem went away and normal operation
> has returned.
>
> For me, that'd be a lot more helpful.
>
> Below is a very short excerpt of the log records I see in a log file:
> (first column is hhmmss.milliseconds)
>
> 165518.521 error: can't bind socket: Can't assign requested address for
> 165518.521 error: can't bind socket: Can't assign requested address for
> 165518.521 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.522 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.523 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.524 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.525 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.526 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.527 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.528 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.529 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.530 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.531 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.532 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.533 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.534 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.535 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
> 165518.536 error: can't bind socket: Can't assign requested address for
>
>
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