Running stop.sh leads to `Error in subprocess, aborting` – Tetrane Help Center

Affected releases:

REVEN Professional starting from 2.4.0
REVEN Enterprise starting from 2.0.0

Full example of the error:

$ ./stop.sh
Traceback (most recent call last):
  File "/home/reven/reven-2.3.0/share/reven/quasar/manage.py", line 28, in <module> execute_from_command_line(sys.argv)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line utility.execute()
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/core/management/__init__.py", line 308, in execute settings.INSTALLED_APPS
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 56, in __getattr__ self._setup(name)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 41, in _setup self._wrapped = Settings(settings_module)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 110, in __init__ mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 944, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 673, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/home/reven/reven-2.3.0/share/reven/quasar/quasar/__init__.py", line 3, in <module> from .celery import app as celery_app
  File "/home/reven/reven-2.3.0/share/reven/quasar/quasar/celery.py", line 10, in <module> app = Celery('quasar-%s' % settings.QUASAR_VERSION)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 56, in __getattr__ self._setup(name)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 41, in _setup self._wrapped = Settings(settings_module)
  File "/home/reven/reven-2.3.0/share/reven/quasar/venv/lib/python3.5/site-packages/django/conf/__init__.py", line 110, in __init__ mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/reven/reven-2.3.0/share/reven/quasar/quasar/settings.py", line 190, in <module> from .settings_quasar import *  # noqa: F401,F402,F403
  File "/home/reven/reven-2.3.0/share/reven/quasar/quasar/settings_quasar.py", line 262, in <module> QUASAR_WEBSOCKIFY_PORT = get_service_port("websockify") or get_free_random_port()
  File "/home/reven/reven-2.3.0/share/reven/quasar/quasar/settings_quasar.py", line 249, in get_service_port os.kill(pid, 0)
PermissionError: [Errno 1] Operation not permitted
Error in subprocess, aborting.
Cmd: ['/home/reven/reven-2.3.0/share/reven/quasar/manage.py', 'quasarctl', 'status']
Return code: 1
Output: b''

This can happen sometimes if the computer running REVEN was shutdown without stopping REVEN first.

In that case, you need to:

find your QUASAR_ROOT variable in the settings (please refer to the documentation on how to find it)
find your precise REVEN package version (2.3.0 in the example stacktrace above)
run something like the following: rm -f $QUASAR_ROOT/$REVEN_VERSION/*.pid to clean all the .pid files REVEN may find
running ./stop.sh before the next ./start.sh should not be necessary, but it’s a good test to check if everything is back to normal