dnsmasq unexpectedly stopped stopped resolving hostnames

[Yaro79]

Hello.

I am running my ubuntu sever for over 2 years - Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-32-generic x86_64) as today.

I am using dnsmasq as DHCP server and DNS forwarder.

Today dnsmasq unexpectedly stopped resolving hostnames.

ps aux|grep dnsmasq

dnsmasq 3359 0.0 0.0 30052 940 ? S 19:13 0:00 /usr/sbin/dnsmasq -x /var/run/dnsmasq/dnsmasq.pid -u dnsmasq -r /var/run/dnsmasq/resolv.conf -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new

cat /etc/resolv.conf

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1

I am not using Network Manager, all interfaces are configured manualy:

cat /etc/network/interfaces

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp
dns-nameservers 8.8.8.8 8.8.4.4

auto eth1
iface eth1 inet static
address 192.168.2.1
netmask 255.255.255.0

auto wlan3
iface wlan3 inet static
address 192.168.3.1
netmask 255.255.255.0

When dnsmasq is running:

nslookup wp.pl

Server: 127.0.0.1
Address: 127.0.0.1#53

Non-authoritative answer:
*** Can't find wp.pl: No answer

When i shut down dnsmasq, all name resolution works fine.

/etc/init.d/dnsmasq stop

* Stopping DNS forwarder and DHCP server dnsmasq
...done.

nslookup wp.pl

Server: 79.135.160.6
Address: 79.135.160.6#53

Non-authoritative answer:
Name: wp.pl
Address: 212.77.100.101

Thanks for any help. This is weird...