Windows 10 psutil.AccessDenied error

[tietjen-douglas]

So when I run python manage.py carrot to try and debug django-carrot on a Windows 10 Pro machine with Django 3.1, I get the following error:

Traceback (most recent call last):
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_common.py", line 446, in wrapper
    ret = self._cache[fun]
AttributeError: _cache

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_pswindows.py", line 679, in wrapper
    return fun(self, *args, **kwargs)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_common.py", line 449, in wrapper
    return fun(self)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_pswindows.py", line 766, in exe
    exe = cext.proc_exe(self.pid)
PermissionError: [WinError 24] The program issued a command but the command length is incorrect: '(originated from NtQuerySystemInformation)'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\django\core\management\__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\django\core\management\base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\carrot\management\commands\carrot.py", line 108, in handle
    if 'python' in q.name():
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\__init__.py", line 615, in name
    name = self._proc.name()
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_pswindows.py", line 750, in name
    return os.path.basename(self.exe())
  File "C:\Users\perkl\.virtualenvs\blmh-L0_mRpJz\lib\site-packages\psutil\_pswindows.py", line 681, in wrapper
    raise convert_oserror(err, pid=self.pid, name=self._name)
psutil.AccessDenied: psutil.AccessDenied (pid=2340)

If I change the \management\commands\carrot.py to the following, then it solves the problem.

            try:
                if 'python' in q.name():
                    if len(q.cmdline()) > 1 and 'manage.py' in q.cmdline()[1] and 'carrot' in q.cmdline()[2]:
                        if os.name == 'nt':
                            if not q._pid == os.getpid():
                                running_pids.append(q._pid)
                        else:
                            if not q._pid == os.getpgid(0):
                                running_pids.append(q._pid)
            except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
                pass

This was just a quick fix and not sure if it is the best way, but thought I would point it out. My addition was the try except part.