Locust server doesn't exit cleanly with ctrl+c ?

[anentropic]

I'm on macos

I have Locust 2.31.5 installed in my project which is managed via pdm

When I run the web ui server:

$ pdm run locust -f website/tests/loadtest/locustfile.py
[2024-09-09 16:32:37,683] MacBook-Air/INFO/locust.main: Starting web interface at http://0.0.0.0:8089
[2024-09-09 16:32:44,897] MacBook-Air/INFO/locust.main: Starting Locust 2.31.5

it starts up fine

Now, I haven't run any load test, just started the server.

I have to hit ctrl+c about 5-6 times to fully quit the server. Is this expected? Is there another preferred way to quit it?

KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 125, in print_exception
    te.print(file=file, chain=chain)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 981, in print
    for line in self.format(chain=chain):
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 919, in format
    yield from _ctx.emit(exc.format_exception_only())
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 634, in emit
    for text in text_gen:
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 833, in format_exception_only
    if isinstance(self.__notes__, collections.abc.Sequence):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen abc>", line 119, in __instancecheck__
  File "<frozen abc>", line 123, in __subclasscheck__
  File "<frozen abc>", line 121, in __subclasscheck__
KeyboardInterrupt
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 125, in print_exception
    te.print(file=file, chain=chain)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 981, in print
    for line in self.format(chain=chain):
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 919, in format
    yield from _ctx.emit(exc.format_exception_only())
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 634, in emit
    for text in text_gen:
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 833, in format_exception_only
    if isinstance(self.__notes__, collections.abc.Sequence):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen abc>", line 117, in __instancecheck__
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 687, in __init__
    _seen.add(id(exc_value))
              ^^^^^^^^^^^^^
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 677, in __init__
    def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,

KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 692, in __init__
    self.stack = StackSummary._extract_from_extended_frame_gen(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 405, in _extract_from_extended_frame_gen
    limit = getattr(sys, 'tracebacklimit', None)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 686, in __init__
    _seen = set()
            ^^^^^
KeyboardInterrupt
KeyboardInterrupt
2024-09-09T16:33:38Z
[2024-09-09 16:33:38,153] Pauls-IFM-MacBook-Air/INFO/locust.main: Shutting down (exit code 0)
Type     Name                                                          # reqs      # fails |    Avg     Min     Max    Med |   req/s  failures/s
--------|------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
--------|------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
         Aggregated                                                         0     0(0.00%) |      0       0       0      0 |    0.00        0.00

Response time percentiles (approximated)
Type     Name                                                                  50%    66%    75%    80%    90%    95%    98%    99%  99.9% 99.99%   100% # reqs
--------|----------------------------------------------------------------|--------|------|------|------|------|------|------|------|------|------|------|------
--------|----------------------------------------------------------------|--------|------|------|------|------|------|------|------|------|------|------|------

^CTraceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 692, in __init__
    self.stack = StackSummary._extract_from_extended_frame_gen(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 405, in _extract_from_extended_frame_gen
    limit = getattr(sys, 'tracebacklimit', None)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyboardInterrupt

[cyberw]

Oh that looks weird. What is the contents of your locustfile? Does it happen even with a minimal locustfile?

[anentropic]

I can reproduce with minimal locustfile:

from locust import HttpUser, task


class BaseReportsUser(HttpUser):
    weight = 10

    @task
    def dummy(self):
        pass

[2024-09-11 09:40:40,145] MacBook-Air/INFO/locust.main: Starting web interface at http://0.0.0.0:8089
[2024-09-11 09:40:40,151] MacBook-Air/INFO/locust.main: Starting Locust 2.31.5
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 125, in print_exception
    te.print(file=file, chain=chain)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 982, in print
    print(line, file=file, end="")
KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 125, in print_exception
    te.print(file=file, chain=chain)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 981, in print
    for line in self.format(chain=chain):
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 919, in format
    yield from _ctx.emit(exc.format_exception_only())
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 635, in emit
    yield textwrap.indent(text, indent_str, lambda line: True)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/textwrap.py", line 470, in indent
    def indent(text, prefix, predicate=None):

KeyboardInterrupt
Traceback (most recent call last):
  File "src/gevent/libev/corecext.pyx", line 1437, in gevent.libev.corecext.gevent_handle_error
  File "src/gevent/libev/corecext.pyx", line 608, in gevent.libev.corecext.loop.handle_error
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 541, in handle_error
    self.print_exception(context, type, value, tb)
  File "/Users/anentropic/dev/myproject/.venv/lib/python3.11/site-packages/gevent/hub.py", line 610, in print_exception
    traceback.print_exception(t, v, tb, file=errstream)
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 124, in print_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 692, in __init__
    self.stack = StackSummary._extract_from_extended_frame_gen(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 416, in _extract_from_extended_frame_gen
    for f, (lineno, end_lineno, colno, end_colno) in frame_gen:
  File "/Users/anentropic/.pyenv/versions/3.11.5/lib/python3.11/traceback.py", line 349, in _walk_tb_with_full_positions
    def _walk_tb_with_full_positions(tb):

KeyboardInterrupt
KeyboardInterrupt
2024-09-11T08:41:27Z
[2024-09-11 09:41:27,713] MacBook-Air/INFO/locust.main: Shutting down (exit code 0)
Type     Name                                                           # reqs      # fails |    Avg     Min     Max    Med |   req/s  failures/s
--------|-------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
--------|-------------------------------------------------------------|-------|-------------|-------|-------|-------|-------|--------|-----------
         Aggregated                                                          0     0(0.00%) |      0       0       0      0 |    0.00        0.00

Response time percentiles (approximated)
Type     Name                                                                   50%    66%    75%    80%    90%    95%    98%    99%  99.9% 99.99%   100% # reqs
--------|-----------------------------------------------------------------|--------|------|------|------|------|------|------|------|------|------|------|------
--------|-----------------------------------------------------------------|--------|------|------|------|------|------|------|------|------|------|------|------

the exact tracebacks and number of ctrl+c required to exit seems to vary (but always seems to be stuck in some gevent traceback handling code), and sometimes the issue does not occur and I just get the last part - the ascii table printed by locust which I assume is what it's supposed to be

[cyberw]

I can't reproduce it myself... Do you get the same error without pdm? Can you list your installed packages? (pip freeze or something)