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[tor-bugs] #11600 [Tor]: Strange nameserver fail warning in Tor log
#11600: Strange nameserver fail warning in Tor log
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Reporter: s7r | Owner:
Type: defect | Status: new
Priority: normal | Milestone: Tor: 0.2.4.x-final
Component: Tor | Version: Tor: 0.2.4.21
Keywords: | Actual Points:
Parent ID: | Points:
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I am running an exit relay on Linux, my Tor version is 0.2.4.21
I checked the log and found this strange warnings:
Apr 24 15:14:07.000 [notice] Circuit handshake stats since last time:
91698/91698 TAP, 15988/15988 NTor.
Apr 24 17:40:45.000 [warn] eventdns: All nameservers have failed
Apr 24 17:40:45.000 [notice] eventdns: Nameserver <ISP-resolver1>:53 is
back up
Apr 24 18:01:51.000 [warn] eventdns: All nameservers have failed
Apr 24 18:01:51.000 [notice] eventdns: Nameserver <ISP-resolver2>:53 is
back up
Apr 24 18:01:52.000 [warn] eventdns: All nameservers have failed
Apr 24 18:01:53.000 [notice] eventdns: Nameserver <ISP-resolver1>:53 is
back up
Apr 24 18:02:00.000 [warn] eventdns: All nameservers have failed
Apr 24 18:02:01.000 [notice] eventdns: Nameserver <ISP-resolver1>:53 is
back up
Apr 24 18:02:01.000 [warn] eventdns: All nameservers have failed
Apr 24 18:02:01.000 [notice] eventdns: Nameserver <ISP-resolver2>:53 is
back up
Apr 24 19:46:22.000 [warn] eventdns: All nameservers have failed
Apr 24 19:46:22.000 [notice] eventdns: Nameserver <ISP-resolver2>:53 is
back up
Apr 24 20:46:25.000 [warn] eventdns: All nameservers have failed
Apr 24 20:46:25.000 [notice] eventdns: Nameserver <ISP-resolver2>:53 is
back up
Apr 24 21:14:07.000 [notice] Heartbeat: Tor's uptime is 8 days 12:00
hours, with 13940 circuits open. I've sent 549.49 GB and received 543.20
GB.
So I thought it's the fault of the nameservers provided by the ISP. Fair
enough, I have configured my own resolver on localhost (where the relay is
running) using BIND 9.10 (latest stable) with dnssec-validation and
everything. I thought I fixed it. After some time, I checked the logs
again and:
Apr 24 23:26:03.000 [warn] eventdns: All nameservers have failed
Apr 24 23:26:03.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Apr 25 02:04:02.000 [warn] eventdns: All nameservers have failed
Apr 25 02:04:02.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Apr 25 02:04:03.000 [warn] eventdns: All nameservers have failed
Apr 25 02:04:04.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Apr 25 02:04:04.000 [warn] eventdns: All nameservers have failed
Apr 25 02:04:05.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Apr 25 02:04:06.000 [warn] eventdns: All nameservers have failed
Apr 25 02:04:06.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Apr 25 02:04:08.000 [warn] eventdns: All nameservers have failed
Apr 25 02:04:08.000 [notice] eventdns: Nameserver 127.0.0.1:53 is back up
Looks like its something Tor related. Why do I get this warning? Does this
have any penalty on the performance or over the users who are using this
node as an exit point? Should I just leave it alone as it works fine? From
what I see nameservers fail and get back online immediately, fail and back
on have same timestamp. Advices? Thanks in advance.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11600>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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