On 28 Jan 2016, at 12:38, Pat Scharmer pat@scharmer.net wrote:
Hi all,
I’m running a server with a couple of relays and was getting good overall performance (120+ Mbps) up until a couple days ago. For the last two days, the log for one of the two relays is showing thousands of the following message:
[notice] Resolved [scrubbed] which was already resolved ignoring
It seems that tor is getting duplicate DNS responses when it sends out a DNS query. Are your resolvers configured correctly?
Have you configured a caching DNS resolver on your machine? (This has been reported to increase throughput substantially.)
Prior to yesterday, I hadn’t ever seen this message in my log (and the second relay on this same server/same IP is not showing any such messages). Since this started, my throughput has dropped from around 120Mbps to about 80Mbps. Looking around on the internet, I can’t find anything about this message. My server is running tor 2.7.6 on Ubuntu.
A misconfigured DNS resolver is one of the common reasons Exit throughput drops.
The relay in question is: https://atlas.torproject.org/#details/FE67A1BA4EF1D13A617AEFB416CB9E44331B22... https://atlas.torproject.org/#details/FE67A1BA4EF1D13A617AEFB416CB9E44331B223A
Thanks for the fingerprint, Atlas confirms your relay is an Exit.
Tim
Tim Wilson-Brown (teor)
teor2345 at gmail dot com PGP 968F094B
teor at blah dot im OTR CAD08081 9755866D 89E2A06F E3558B7F B5A9D14F