What is the problem?
I've used octoprint for a number of years on a Raspberry PI 3 with an older printer without problem. I reflashed with SimplyPi when I got my new printer and while it works fine initially if I turn off the printer after I'm finished printing for the day, once I turn the printer back on OctoPrint cannot reconnect to the printer unless I restart the Raspberry Pi. I see in the logs it keeps saying stuff like "can't start new thread" but I can't tell from the logs what might be causing it.
What did you already try to solve it?
Rebooting Raspbery Pi seems to be only thing that solves the issue. Also unable to reboot OctoPrint or the Pi via menu command because of the "can't start new thread" error.
Have you tried running in safe mode?
No.
Did running in safe mode solve the problem?
Didn't try.
Systeminfo Bundle
octoprint-systeminfo-20220701211115.zip (937.8 KB)
Additional information about your setup
OctoPrint 1.8.1, SimplyPi 3.1.2, Ender 3 S1, Chrome, Windows 10
2022-07-01 20:17:31,301 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2022-07-01 20:17:31,438 - octoprint.plugins.SimplyPrint.comm - INFO - Connecting printer
2022-07-01 20:17:31,846 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': 'No more candidates to test, and no working port/baudrate combination detected.'}
2022-07-01 20:17:31,871 - octoprint.plugins.SimplyPrint.comm - ERROR - can't start new thread
Traceback (most recent call last):
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_simplyprint/comm/simplyprint.py", line 132, in main_loop
request = self.request()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_simplyprint/comm/simplyprint.py", line 504, in request
self.process_demands(demand_list, response_json)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_simplyprint/comm/simplyprint.py", line 666, in process_demands
self.printer.connect()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/__init__.py", line 404, in wrapper
return f(*args, **kwargs)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/printer/standard.py", line 381, in connect
self._comm.start()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/util/comm.py", line 822, in start
self.sending_thread.start()
File "/home/pi/oprint/lib/python3.7/site-packages/sentry_sdk/integrations/threading.py", line 54, in sentry_start
return old_start(self, *a, **kw)
File "/usr/lib/python3.7/threading.py", line 847, in start
_start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread
2022-07-01 20:17:31,867 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2022-07-01 20:17:31,904 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 7 port/baudrate candidates: /dev/ttyUSB0@115200, /dev/ttyUSB0@250000, /dev/ttyUSB0@230400, /dev/ttyUSB0@57600, /dev/ttyUSB0@38400, /dev/ttyUSB0@19200, /dev/ttyUSB0@9600
2022-07-01 20:17:31,905 - octoprint.util.comm - INFO - Serial detection: Trying port /dev/ttyUSB0, baudrate 115200
2022-07-01 20:17:31,911 - octoprint.util.comm - INFO - Connecting to port /dev/ttyUSB0, baudrate 115200
2022-07-01 20:17:31,992 - octoprint.util.comm - INFO - Serial detection: Handshake attempt #1 with timeout 2.0s
2022-07-01 20:17:32,048 - octoprint.util.comm - ERROR - Something crashed inside the serial connection loop, please report this in OctoPrint's bug tracker:
Traceback (most recent call last):
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/util/comm.py", line 3100, in _monitor
self._onConnected()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/util/comm.py", line 3601, in _onConnected
self._temperature_timer.start()
File "/home/pi/oprint/lib/python3.7/site-packages/sentry_sdk/integrations/threading.py", line 54, in sentry_start
return old_start(self, *a, **kw)
File "/usr/lib/python3.7/threading.py", line 847, in start
_start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread
2022-07-01 20:17:32,139 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Offline after error"
2022-07-01 20:17:32,167 - octoprint.access.users - INFO - Cleaning up user session 7C68565AEC7C4F8C97CE818892B07D86 for user _api
2022-07-01 20:17:32,170 - octoprint.access.users - INFO - Logged out user: _api
2022-07-01 20:17:32,171 - octoprint.access.users - INFO - Cleaning up user session 0E34EE782CCB4C099E45202160672B20 for user pougan
2022-07-01 20:17:32,172 - octoprint.server.util.sockjs - INFO - User pougan logged out, logging out on socket
2022-07-01 20:17:32,181 - octoprint.access.users - INFO - Logged out user: pougan
2022-07-01 20:17:32,182 - octoprint.access.users - INFO - Logged in user: pougan
2022-07-01 20:17:32,185 - octoprint.server.api - INFO - Actively logging in user pougan from ::ffff:192.168.50.138
2022-07-01 20:17:32,297 - octoprint.server.util.flask - INFO - Passively logging in user pougan from ::ffff:192.168.50.87
2022-07-01 20:17:32,299 - octoprint.access.users - INFO - Logged in user: pougan
2022-07-01 20:17:32,353 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2022-07-01 20:17:32,377 - octoprint.server.util.sockjs - INFO - User pougan logged in on the socket from client ::ffff:192.168.50.87
2022-07-01 20:17:32,418 - octoprint.server.util.flask - INFO - Passively logging in user pougan from ::ffff:192.168.50.138
2022-07-01 20:17:32,419 - octoprint.access.users - INFO - Logged in user: pougan
2022-07-01 20:17:32,868 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_crash, payload: {'commerror_text': 'See octoprint.log for details'}
2022-07-01 20:17:32,899 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.50.138
2022-07-01 20:17:33,980 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.50.138
2022-07-01 20:17:34,030 - octoprint.server.util.flask - INFO - Passively logging in user pougan from ::ffff:192.168.50.138
2022-07-01 20:17:34,031 - octoprint.access.users - INFO - Logged in user: pougan
2022-07-01 20:17:34,614 - octoprint.plugins.softwareupdate - INFO - Fetching check overlays from https://plugins.octoprint.org/update_check_overlay.json
2022-07-01 20:17:37,277 - octoprint.server.util.sockjs - INFO - User pougan logged in on the socket from client ::ffff:192.168.50.138
2022-07-01 20:17:37,567 - octoprint.server.api - ERROR - Error calling SimpleApiPlugin pi_support
Traceback (most recent call last):
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/server/api/__init__.py", line 90, in pluginData
response = api_plugin.on_api_get(request)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/util/__init__.py", line 1688, in wrapper
return f(*args, **kwargs)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_pi_support/__init__.py", line 343, in on_api_get
result = self.get_additional_environment()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint/util/__init__.py", line 1688, in wrapper
return f(*args, **kwargs)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_pi_support/__init__.py", line 323, in get_additional_environment
self._check_throttled_state()
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_pi_support/__init__.py", line 481, in _check_throttled_state
state = get_vcgencmd_throttled_state(command)
File "/home/pi/oprint/lib/python3.7/site-packages/octoprint_pi_support/__init__.py", line 200, in get_vcgencmd_throttled_state
output, error = sarge.get_both(command, close_fds=CLOSE_FDS)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1542, in get_both
p = capture_both(cmd, **kwargs)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1512, in capture_both
return run(cmd, **kwargs)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1480, in run
p.run(input=input, async_=async_)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1087, in run
self.run_node(node, input=input, async_=False)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1205, in run_node
result = getattr(self, method)(node, input, async_)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 1351, in run_command_node
node.cmd.run(input=input, async_=async_)
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 691, in run
s.add_stream(getattr(p, attr))
File "/home/pi/oprint/lib/python3.7/site-packages/sarge/__init__.py", line 218, in add_stream
t.start()
File "/home/pi/oprint/lib/python3.7/site-packages/sentry_sdk/integrations/threading.py", line 54, in sentry_start
return old_start(self, *a, **kw)
File "/usr/lib/python3.7/threading.py", line 847, in start
_start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread
2022-07-01 20:17:38,612 - octoprint.plugins.announcements - INFO - Loaded channel _important from https://octoprint.org/feeds/important.xml in 0.46s
2022-07-01 20:17:39,227 - octoprint.plugins.announcements - INFO - Loaded channel _releases from https://octoprint.org/feeds/releases.xml in 0.49s
2022-07-01 20:17:39,787 - octoprint.plugins.announcements - INFO - Loaded channel _blog from https://octoprint.org/feeds/octoblog.xml in 0.5s
```</small>