exit relay fails with 'unbound' DNS resolver when lots of requests time-out
|Reported by:||Dhalgren||Owned by:|
|Component:||Core Tor/Tor||Version:||Tor: 0.2.7.6|
[tor-relays] What does this message mean in my tor logs?
[tor-relays] unbound bogs down strangely, degrading exit relay
Relay daemon ceases to service Tor Browser requests, timing out, when a local instance of 'unbound' is the DNS resolver and large numbers of DNS requests time-out.
Works fine when 'named' is swapped in place of 'unbound'.
GoDaddy DNS stops responding when large numbers of queries are submitted and this was observed as the particular trigger.
To reproduce, configure the SOA+NS records for several thousand dummy domains to point to a non-responding IP, then generate large numbers of requests against them.
are helpful for identifying the state.
Have debug-level daemon trace taken when relay was in the unresponsive condition described.
Change History (22)
comment:2 Changed 13 months ago by s7r
- Severity changed from Major to Normal
- Status changed from new to needs_information
comment:3 Changed 13 months ago by Dhalgren
- Severity changed from Normal to Major
- Status changed from needs_information to new