[tor-talk] [warn] assign_to_cpuworker failed. Ignoring.

[Udo van den Heuvel]

Hello,

The assign_to_cpuworker issue appeared again.
See below for some logging from notices.log.
What is causing this?
I noticed a high CPU load coinciding with these messages.
Please let me know how to fix this.

Udo

Feb 28 15:54:27.000 [notice] Heartbeat: Tor's uptime is 4 days 5:59
hours, with 484 circuits open. I've sent 45.53 GB and received 45.21 GB.
Feb 28 15:54:27.000 [notice] Heartbeat: Accounting enabled. Sent: 941.20
MB, Received: 931.36 MB, Used: 957.53 MB / 99.00 GB, Rule: max. The
current accounting interval ends on 2017-03-01 12:21:00, in 20:26
hours.
Feb 28 15:54:27.000 [notice] Circuit handshake stats since last time:
3643/3643 TAP, 36324/36324 NTor.
Feb 28 15:54:27.000 [notice] Since startup, we have initiated 0 v1
connections, 0 v2 connections, 1 v3 connections, and 70514 v4
connections; and received 382 v1 connections, 4159 v2 connections, 5961
v3 con
nections, and 182525 v4 connections.
Feb 28 15:55:06.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:00:04.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:05:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:10:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:15:04.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:20:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:25:08.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:30:07.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:35:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:40:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:45:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:50:11.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 16:55:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 17:00:05.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 17:05:08.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 17:10:10.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 17:15:17.000 [notice] New control connection opened from 127.0.0.1.
Feb 28 17:15:17.000 [warn] assign_to_cpuworker failed. Ignoring.
Feb 28 17:15:17.000 [warn] assign_to_cpuworker failed. Ignoring.
Feb 28 17:15:17.000 [warn] assign_to_cpuworker failed. Ignoring.
Feb 28 17:15:17.000 [warn] assign_to_cpuworker failed. Ignoring.
Feb 28 17:15:18.000 [warn] assign_to_cpuworker failed. Ignoring.
(etc, many many more)