reply-to: tor-dev On Monday 29 September 2014 15:00:29 tor-admin wrote:

since upgrading torland to 0.2.5.8-rc I see the below warnings. Is this something to worry about?

IMHO this might be due to a programming error in the circuit ID selection code or possibly indicate a DoS attack.

-------------------------------------------------------------------------- Sep 28 16:07:24.000 [warn] No unused circIDs found on channel without wide circID support, with 0 inbound and 4 outbound circuits. Found 0 circuit IDs in use by circuits, and 64 with pending destroy cells. (0 of those were marked bogusly.) The ones with pending destroy cells have been marked unusable for an average of 7594 seconds and a maximum of 16137 seconds. This channel is 18469 seconds old. Failing a circuit. Sep 28 16:07:24.000 [warn] Circuitmux on this channel has 4 circuits, of which 4 are active. It says it has 29535 destroy cells queued.

Those lines are important. I would suggest opening a ticket on trac. See #11553. Best, Robert