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Trying to start cluster trait error
I keep trying to launch a cluster through both Jupyter notebook and the terminal interface. below is the output of the ipcluster start command.
ipcluster start -n 1 --debug
2022-08-04 17:43:25.240 [IPClusterStart] IPYTHONDIR set to: /home/dylan/.ipython
2022-08-04 17:43:25.241 [IPClusterStart] Using existing profile dir: '/home/dylan/.ipython/profile_default'
2022-08-04 17:43:25.241 [IPClusterStart] Searching path ['/home/dylan', '/home/dylan/.ipython/profile_default', '/usr/etc/ipython', '/usr/local/etc/ipython', '/etc/ipython'] for config files
2022-08-04 17:43:25.241 [IPClusterStart] Attempting to load config file: ipython_config.py
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipython_config in /etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipython_config in /usr/local/etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipython_config in /usr/etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipython_config in /home/dylan/.ipython/profile_default
2022-08-04 17:43:25.241 [IPClusterStart] Loaded config file: /home/dylan/.ipython/profile_default/ipython_config.py
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipython_config in /home/dylan
2022-08-04 17:43:25.241 [IPClusterStart] Attempting to load config file: ipcluster_config.py
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipcluster_config in /etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipcluster_config in /usr/local/etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipcluster_config in /usr/etc/ipython
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipcluster_config in /home/dylan/.ipython/profile_default
2022-08-04 17:43:25.241 [IPClusterStart] Looking for ipcluster_config in /home/dylan
2022-08-04 17:43:25.242 [IPClusterStart] Forwarding SIGUSR1 to engines
2022-08-04 17:43:25.242 [IPClusterStart] Forwarding SIGUSR2 to engines
2022-08-04 17:43:25.242 [IPClusterStart] Not forwarding SIGINFO
2022-08-04 17:43:25.243 [IPClusterStart] Starting ipcluster with [daemonize=False]
2022-08-04 17:43:25.244 [IPClusterStart] Starting LocalControllerLauncher: ['/usr/bin/python3', '-m', 'ipyparallel.controller']
2022-08-04 17:43:25.244 [IPClusterStart] Sending output for ipcontroller-8096 to /home/dylan/.ipython/profile_default/log/ipcontroller-8096.log
2022-08-04 17:43:25.244 [IPClusterStart] Setting environment: IPP_CLUSTER_ID,IPP_PROFILE_DIR
2022-08-04 17:43:25.247 [IPClusterStart] LocalControllerLauncher /usr/bin/python3 started: 8099
2022-08-04 17:43:25.247 [IPClusterStart] Updating /home/dylan/.ipython/profile_default/security/cluster-.json
Traceback (most recent call last):
File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/controller/__main__.py", line 4, in <module>
main()
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/controller/app.py", line 1275, in main
return IPController.launch_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/config/application.py", line 662, in launch_instance
app = cls.instance(**kwargs)
File "/usr/lib/python3/dist-packages/traitlets/config/configurable.py", line 412, in instance
inst = cls(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 958, in __new__
inst.setup_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 986, in setup_instance
super(HasTraits, self).setup_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 977, in setup_instance
value.instance_init(self)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 2266, in instance_init
self._trait.instance_init(obj)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 522, in instance_init
v = self._validate(obj, self.default_value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 591, in _validate
value = self.validate(obj, value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 1871, in validate
return _validate_bounds(self, obj, value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 1840, in _validate_bounds
raise TraitError(
traitlets.traitlets.TraitError: The value of the 'None' trait of an IPController instance should not be less than 1, but a value of 0 was specified
2022-08-04 17:43:25.620 [IPClusterStart] LocalControllerLauncher /usr/bin/python3 stopped: {'exit_code': 1, 'pid': 8099, 'identifier': 'ipcontroller-8096'}
2022-08-04 17:43:25.620 [IPClusterStart] Removing /home/dylan/.ipython/profile_default/log/ipcontroller-8096.log
2022-08-04 17:43:25.620 [IPClusterStart] Output for ipcontroller-8096:
Traceback (most recent call last):
File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/controller/__main__.py", line 4, in <module>
main()
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/controller/app.py", line 1275, in main
return IPController.launch_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/config/application.py", line 662, in launch_instance
app = cls.instance(**kwargs)
File "/usr/lib/python3/dist-packages/traitlets/config/configurable.py", line 412, in instance
inst = cls(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 958, in __new__
inst.setup_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 986, in setup_instance
super(HasTraits, self).setup_instance(*args, **kwargs)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 977, in setup_instance
value.instance_init(self)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 2266, in instance_init
self._trait.instance_init(obj)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 522, in instance_init
v = self._validate(obj, self.default_value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 591, in _validate
value = self.validate(obj, value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 1871, in validate
return _validate_bounds(self, obj, value)
File "/usr/lib/python3/dist-packages/traitlets/traitlets.py", line 1840, in _validate_bounds
raise TraitError(
traitlets.traitlets.TraitError: The value of the 'None' trait of an IPController instance should not be less than 1, but a value of 0 was specified
2022-08-04 17:43:25.620 [IPClusterStart] WARNING | Controller stopped: {'exit_code': 1, 'pid': 8099, 'identifier': 'ipcontroller-8096'}
2022-08-04 17:43:25.620 [IPClusterStart] Removed cluster file: /home/dylan/.ipython/profile_default/security/cluster-.json
2022-08-04 17:43:26.274 [IPClusterStart] Setting $IPP_CONNECTION_INFO environment
2022-08-04 17:43:26.274 [IPClusterStart] Waiting for ['/home/dylan/.ipython/profile_default/security/ipcontroller-client.json', '/home/dylan/.ipython/profile_default/security/ipcontroller-engine.json']
2022-08-04 17:43:26.375 [IPClusterStart] Already notified stop (data)
ERROR:tornado.application:Exception in callback functools.partial(<function wrap.<locals>.null_wrapper at 0x7faa38be9ca0>, <Task finished name='Task-1' coro=<IPClusterStart.start_cluster() done, defined at /home/dylan/.local/lib/python3.8/site-packages/ipyparallel/cluster/app.py:568> exception=RuntimeError("Controller stopped with unknown while waiting for ['/home/dylan/.ipython/profile_default/security/ipcontroller-client.json', '/home/dylan/.ipython/profile_default/security/ipcontroller-engine.json']")>)
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 758, in _run_callback
ret = callback()
File "/usr/lib/python3/dist-packages/tornado/stack_context.py", line 300, in null_wrapper
return fn(*args, **kwargs)
File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 779, in _discard_future_result
future.result()
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/cluster/app.py", line 569, in start_cluster
await self.cluster.start_cluster()
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/cluster/cluster.py", line 780, in start_cluster
await self.start_engines(n)
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/cluster/cluster.py", line 698, in start_engines
connection_info = await self.controller.get_connection_info()
File "/home/dylan/.local/lib/python3.8/site-packages/ipyparallel/cluster/launcher.py", line 377, in get_connection_info
raise RuntimeError(
RuntimeError: Controller stopped with unknown while waiting for ['/home/dylan/.ipython/profile_default/security/ipcontroller-client.json', '/home/dylan/.ipython/profile_default/security/ipcontroller-engine.json']
^C2022-08-04 17:43:36.605 [IPClusterStart] Received signal 2 received, stopping launchers...
2022-08-04 17:43:36.606 [IPClusterStart] ERROR | IPython cluster: stopping
2022-08-04 17:43:36.606 [IPClusterStart] Updating /home/dylan/.ipython/profile_default/security/cluster-.json
2022-08-04 17:43:36.607 [IPClusterStart] Stopping engine(s): 1659656606
2022-08-04 17:43:36.607 [IPClusterStart] Removed cluster file: /home/dylan/.ipython/profile_default/security/cluster-.json
raise TraitError(
traitlets.traitlets.TraitError: The value of the 'None' trait of an IPController instance should not be less than 1, but a value of 0 was specified
Sorry I missed this. That's certainly a strange error I haven't seen before. Can you share pip list and the OS, Python version? Do you have any configuration files in your default profile? If you haven't aready, can you check that packages are up-to-date, especially ipyparallel, traitlets, and ipykernel?
Does it work if you do e.g. ipcluster start -n 1 --profile empty?
Closing for now, since there isn't enough information to go off of. If you can reproduce and answer the above questions, feel free to reopen.