id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
2837	create-node --listen=tor hangs with tor-0.2.8.8	warner		"After finishing off #2490, I noticed during testing that `tahoe create-node --listen=tor` consistently hangs on one of my test machines (which is running debian/sid, with tor-0.2.8.8 git-!8d8a099454d994bd). This happens when the system Tor process has been running for a while, at least a few days. If I bounce the Tor process, then create-node finishes correctly in the 30-40 seconds that I expect it to take.

This doesn't happen on an Ubuntu-16.04 box (running tor-0.2.7.6 git-!605ae665009853bd). Both cases are using txtorcon-0.17.0 . I'm guessing that there's something broken with the Tor on my sid box, but maybe there's something about the tor-control-port command stream in the more recent Tor that's confusing txtorcon.

Meejah suggested a patch like this to turn on command-stream debugging:

{{{
from txtorcon.log import debug_logging
debug_logging()
}}}

and with that, I found differences between the two command streams. They're identical (modulo the random auth-cookie) through the following commands and their responses:

{{{
cmd: AUTHCHALLENGE SAFECOOKIE [cookie]
cmd: AUTHENTICATE [cookie]
cmd: GETINFO signal/names
cmd: GETINFO version
Connected to a Tor with VERSION [version]
cmd: GETINFO events/names
cmd: USEFEATURE EXTENDED_EVENTS
cmd: GETINFO ns/all
6278 named routers found.
[list of duplicates]
2494 GUARDs
}}}

At that point, both do a `cmd: GETINFO circuit-status`. The working case (with 0.2.7.6) gets back a bunch of `circuit_(new|extend|built)` responses, then does a series of `GETINFO ip-to-country/[ipaddr]` commands, then a `GETINFO stream-status`. The hanging case sends the circuit-status but never sees the `circuit_*` messages, and goes directly to the `GETINFO stream-status`.

I don't know if this debugging includes the actual responses to each command, or if it's just logging async notifications.
"	defect	new	normal	undecided	code-network	1.11.0		anonymity tor	meejah