[tor-relays] Address mismatch on received DNS packet

[TonyXue]

Hi Everyone,
I've just started to run a tor relay these days. But there are many warnings like this in my log file.
Jul 05 11:25:19.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:25:38.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:25:42.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:32:18.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:32:18.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:32:18.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:32:18.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:32:23.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.236:53Jul 05 11:39:14.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:39:48.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:39:48.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:39:48.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53Jul 05 11:39:48.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:39:48.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.236:53Jul 05 11:39:53.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:39:53.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.234:53Jul 05 11:39:58.000 [warn] eventdns: Address mismatch on received DNS packet.  Apparent source was 66.80.130.235:53
Also with some warnings:
Jul 05 12:36:58.000 [warn] eventdns: All nameservers have failedJul 05 12:36:58.000 [notice] eventdns: Nameserver 64.81.45.2:53 is back up

Is the nameservers mentioned above are set to be Tor's resolvers? If they are, where  can I change the settings of DNS servers?

Hope someone can help me with this...
Thanks a lot. 		 	   		  
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