Maintained by: NLnet Labs

unbound generating too many log messages

W.C.A. Wijngaards
Tue Jan 19 16:50:07 CET 2016


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Hi Mike,

On 19/01/16 16:37, Mike via Unbound-users wrote:
> On 1/19/2016 10:20 AM, Taylor R Campbell via Unbound-users wrote:
>> 
>> That's irrelevant to the issue Philippe raised.  The network is
>> not always available, no matter how well you configure your
>> system or engineer your software.  The problem here is that when
>> the network is down, Unbound spews junk to its log as fast as it
>> can.
>> 
>> [snip]
> 
> At one point, on this mailing list I documented 20,000 syslog
> messages per second from unbound when the network interface was
> unavailable for a couple of seconds. 
> http://marc.info/?l=unbound-users&m=137166462329717&w=2
> 
> While unbound logging has improved a bit since then, I still see
> far too many essentially duplicate syslog messages for a single
> network unavailable event.
> 
> If I need high volume logging for troubleshooting, I'll increase
> the logging verbosity.  Logging should be something that is
> helpful, not something I cringe about.

Is it always the "sendto failed:" error that makes you cringe?  That
aren't already squelched by logging verbosity?  Is there an errno that
I should also squelch, or should I squelch all errors from the
sendto() system call?

Best regards, Wouter
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