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Re: [tor-relays] assign_to_cpuworker failed. Ignoring.



Am 01.11.2016 um 13:19 schrieb Vinícius Zavam:

2016-10-31 20:22 GMT-03:00, Felix <zwiebel@xxxxxxxxxxxxxxxx>:



Am 31.10.2016 um 23:40 schrieb Vinícius Zavam:

2016-10-19 2:30 GMT-03:00, teor <teor2345@xxxxxxxxx>:



On 19 Oct. 2016, at 16:25, Felix <zwiebel@xxxxxxxxxxxxxxxx> wrote:

Hi everybody

May be someone can help with this warning:

The security update (Tor v0.2.8.9 running on FreeBSD with Libevent
2.0.22-stable, OpenSSL LibreSSL 2.4.3 and Zlib 1.2.8.) shows the
following
log entry each hour:

Oct 19 02:51:07.000 [warn] Your system clock just jumped 136 seconds
forward; assuming established circuits no longer work.
Oct 19 02:51:07.000 [warn] assign_to_cpuworker failed. Ignoring.
...
Oct 19 02:51:07.000 [warn] assign_to_cpuworker failed. Ignoring.
Oct 19 02:51:15.000 [notice] Tor has successfully opened a circuit.
Looks
like client functionality is working.
...
Oct 19 03:51:10.000 [warn] Your system clock just jumped 138 seconds
forward; assuming established circuits no longer work.
Oct 19 03:51:11.000 [warn] assign_to_cpuworker failed. Ignoring.
...
Oct 19 04:50:37.000 [warn] Your system clock just jumped 105 seconds
forward; assuming established circuits no longer work.
Oct 19 04:50:37.000 [warn] assign_to_cpuworker failed. Ignoring.
...
Oct 19 05:51:14.000 [warn] Your system clock just jumped 142 seconds
forward; assuming established circuits no longer work.
Oct 19 05:51:15.000 [warn] assign_to_cpuworker failed. Ignoring.
...

The warning first appeared on 2.8.7 after update on September 13th (Tor
v0.2.8.7 running on FreeBSD with Libevent 2.0.22-stable, OpenSSL
LibreSSL
2.4.2 and Zlib 1.2.8.). That time I switched back (Tor v0.2.7.6 running
on
FreeBSD with Libevent 2.0.22-stable, OpenSSL LibreSSL 2.4.2 and Zlib
1.2.8.) and the warning disappeared.

What can I do?

The warning is reproted in tor-talk:
https://
lists.torproject.org/pipermail/tor-talk/2016-October/042425.html


Thanks for reporting this issue - you could open a bug on our bug
tracker
under Core Tor/Tor:
https://trac.torproject.org/projects/tor/newticket

It would help us to know if it's just FreeBSD, or just LibreSSL.

Maybe mention the bug number on tor-talk, so that poster can provide
more details?

Tim



--
Best regards, Felix


T

--
Tim Wilson-Brown (teor)


felix,

that might not be related to Tor, but to your host's clock setup
and/or your jail's setup.

# tor --version
Tor version 0.2.9.4-alpha (git-8b0755c9bb296ae2).
# uname -ai
FreeBSD cq110a 10.3-RELEASE-p7 FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11
18:37:29 UTC 2016
root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/GENERIC  i386
GENERIC
# grep -i jump /var/log/tor/notice.log | wc -l
         0
# sysctl security.jail.jailed
security.jail.jailed: 1
# uptime
   7:32PM  up 18 days,  4:44, 1 user, load averages: 0.21, 0.21, 0.17



Good to see Tor in a jail runs for you. For me it did until 0.2.8.
You want to take a look at https://
trac.torproject.org/projects/tor/ticket/20423 ?

--
Cheers, Felix



thanks for pointing out the ticket.
how long should we wait to see the warning?

# git branch
   maint-0.2.9
   master
* release-0.2.8

# tor --version
Tor version 0.2.8.9-dev (git-badc444f7adce748).

# head /var/log/tor/notice.log_r0289
Oct 31 22:48:44.000 [notice] Tor 0.2.8.9-dev (git-badc444f7adce748)
opening new log file.
Oct 31 22:48:44.632 [notice] Tor v0.2.8.9-dev (git-badc444f7adce748)
running on FreeBSD with Libevent 2.0.22-stable, OpenSSL LibreSSL 2.5.0
and Zlib 1.2.8.
Oct 31 22:48:44.633 [notice] Tor can't help you if you use it wrong!
Learn how to be safe at
https://www.torproject.org/download/download#warning
Oct 31 22:48:44.633 [notice] Read configuration file "/usr/local/etc/tor/torrc".
Oct 31 22:48:44.742 [notice] Opening OR listener on [xxxx:xxxy:xxxz::abcd]:9021
Oct 31 22:48:44.752 [notice] Opening OR listener on a.b.c.d:9021
Oct 31 22:48:44.752 [notice] Opening Extended OR listener on 127.0.0.1:0
Oct 31 22:48:44.752 [notice] Extended OR listener listening on port 29790.
Oct 31 22:48:44.752 [notice] Opening Directory listener on a.b.c.d:9000
Oct 31 22:48:44.000 [notice] Parsing GEOIP IPv4 file /usr/local/share/tor/geoip.

# uname -ai
FreeBSD cq110a 10.3-RELEASE-p7 FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11
18:37:29 UTC 2016
root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/GENERIC  i386
GENERIC

# tail -n3 /var/log/tor/notice.log_r0289
Nov 01 08:51:24.000 [notice] Heartbeat: Tor's uptime is 10:00 hours,
with 19 circuits open. I've sent 167.56 MB and received 175.42 MB.
Nov 01 08:51:24.000 [notice] Circuit handshake stats since last time:
44/44 TAP, 187/187 NTor.
Nov 01 08:51:24.000 [notice] Since startup, we have initiated 0 v1
connections, 0 v2 connections, 0 v3 connections, and 1357 v4
connections; and received 0 v1 connections, 59 v2 connections, 52 v3
connections, an

# grep -i jump /var/log/tor/notice.log_r0289 | wc -l
        0



I see warnings with about more than 500 circuits.

My log says:
Oct 19 01:04:52.527 [notice] Read configuration file "/usr/local/etc/tor/torrc". 
Oct 19 01:04:52.566 [notice] Opening OR listener on 0.0.0.0:1234
for
ORPort 443 NoListen
ORPort 1234 NoAdvertise
My Tor finds 0.0.0.0 and looks further out ...

I see yours telling:
Oct 31 22:48:44.752 [notice] Opening OR listener on a.b.c.d:9021
Hm. Can you please share your torrc line for the "ORPort [address:]PORT|auto [flags]" directive? Can you give an example which is your a.b.c.d, is it the external or a local (lo#) and how do you set NoListen/NoAdvertise ? I want to avoid Tor guessing the ip. 

--
Cheers, Felix
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