Date: Fri, 16 Oct 2015 13:28:12 +0200 From: "W.C.A. Wijngaards via Unbound-users" <unbound-users at unbound.net> On 10/16/2015 12:47 PM, Hendrik Jaeger via Unbound-users wrote: > I'm running unbound 1.4.22 from debian unstable on my laptop. Since > yesterday unbound started behaving strangely, flooding the syslog > with failure messages. Example: Oct 16 10:23:20 frustcomp unbound: > [26958:0] notice: sendto failed: Cannot assign requested address > Oct 16 10:23:20 frustcomp unbound: [26958:0] notice: remote address > is 2001:500:3::42 port 53 The newer versions of unbound have many fixes. Several of them have related to squelching log messages. On many versions of Unbound, on NetBSD 5 and 6, when the network goes down, whether or not IPv6 is involved, I have seen it spew essentially this message to the log, e.g.:  unbound[27554:0] notice: remote address is 188.8.131.52 port 53  unbound[27554:0] notice: sendto failed: Can't assign requested address However, even if the log is sent to /dev/null, Unbound is spinning trying and failing to do sendto as fast as it can and draining my laptop battery. So I'm worried that `squelching log messages' may paper over a legitimate error here, and I wonder whether any bugs involving loops with sendto -- whether or not logging -- have been fixed.