[7.12.1] AccessDenied in set_process_priority

[kozlovsky]

Here:

def set_process_priority(pid=None, priority_order=1):
    ...
    process = psutil.Process(pid if pid else os.getpid())

    if sys.platform == 'win32':
        ...
    elif sys.platform == 'darwin' or sys.platform == 'linux2':
        # On Unix, priority can be -20 to 20, but usually not allowed to set below 0, we set our classes somewhat in
        # that range.
        priority_classes = [5, 4, 3, 2, 1, 0]
        process.nice(priority_classes[priority_order])  # <-- here

run_tribler.py in <module> at line 94
tribler/core/start_core.py in run_core at line 185
tribler/core/start_core.py in run_tribler_core_session at line 148
tribler/core/check_os.py in set_process_priority at line 84
__init__.py in nice at line 724

It looks like we should wrap the process.nice call with try/except block, catch the psutil.AccessDenied exception, and log it (probably put try/except at the top level of the function to catch possible Windows errors as well).

[sentry-for-tribler]

Sentry issue: TRIBLER-16J