gevent.timeout.Timeout: 0.0 seconds

[scottgigante]

• gevent version: 23.9.1 from PyPi
• Python version: python 3.11.4 from docker image python:3.11.4-bookworm
• Operating System: Debian GNU/Linux 12 (bookworm) from docker image python:3.11.4-bookworm

Description:

I am running django+gunicorn with gevent and getting seemingly random gevent timeouts with a timeout length of 0.0 seconds. It's unclear to me why this timeout is being set. Any help would be appreciated!

Exception ignored in: <finalize object at 0x7f7e1a8349a0; dead>
--
  | Traceback (most recent call last):
  | File "/usr/local/lib/python3.11/weakref.py", line 590, in __call__
  | return info.func(*info.args, **(info.kwargs or {}))
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  | File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 1179, in _close_pool_connections
  | conn = pool.get(block=False)
  | ^^^^^^^^^^^^^^^^^^^^^
  | File "/usr/local/lib/python3.11/queue.py", line 182, in get
  | self.not_full.notify()
  | File "/usr/local/lib/python3.11/threading.py", line 369, in notify
  | if not self._is_owned():
  | ^^^^^^^^^^^^^^^^
  | File "/usr/local/lib/python3.11/threading.py", line 282, in _is_owned
  | if self._lock.acquire(False):
  | ^^^^^^^^^^^^^^^^^^^^^^^^^
  | File "/usr/local/lib/python3.11/site-packages/gevent/thread.py", line 132, in acquire
  | sleep()
  | File "/usr/local/lib/python3.11/site-packages/gevent/hub.py", line 159, in sleep
  | waiter.get()
  | File "src/gevent/_waiter.py", line 143, in gevent._gevent_c_waiter.Waiter.get
  | File "src/gevent/_waiter.py", line 154, in gevent._gevent_c_waiter.Waiter.get
  | File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  | File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  | File "src/gevent/_greenlet_primitives.py", line 65, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  | File "src/gevent/_gevent_c_greenlet_primitives.pxd", line 35, in gevent._gevent_c_greenlet_primitives._greenlet_switch
  | gevent.timeout.Timeout: 0.0 seconds

What I've run:

Not able to create a MRE unfortunately, but this is how I run gunicorn.

exec gunicorn <my_app> \
--name my_app \
--workers 3 \
--worker-class gevent \
--timeout 120 \
--bind=unix:/usr/var/run/gunicorn.sock \
--log-level=warning \
--log-file=-

[SmallPineApp1e]

Same exception occurred on me

[rconroy293]

I'm seeing something similar in a Gunicorn / Flask / SQLAlchemy / PyMySQL setup on Python 3.11.7. Package versions:

Flask==2.2.5
gevent==23.9.1
greenlet==3.0.1
gunicorn==21.2.0
PyMySQL==1.1.0
SQLAlchemy==2.0.23

Stack trace is below:

Exception during reset or similar
Traceback (most recent call last):
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 988, in _finalize_fairy
    fairy._reset(
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 1438, in _reset
    pool._dialect.do_rollback(self)
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/sqlalchemy/engine/default.py", line 692, in do_rollback
    dbapi_connection.rollback()
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/pymysql/connections.py", line 488, in rollback
    self._read_ok_packet()
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/pymysql/connections.py", line 448, in _read_ok_packet
    pkt = self._read_packet()
          ^^^^^^^^^^^^^^^^^^^
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/pymysql/connections.py", line 739, in _read_packet
    packet_header = self._read_bytes(4)
                    ^^^^^^^^^^^^^^^^^^^
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/pymysql/connections.py", line 779, in _read_bytes
    data = self._rfile.read(num_bytes)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/socket.py", line 706, in readinto
    return self._sock.recv_into(b)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/some-virtualenv-py3.11/lib/python3.11/site-packages/gevent/_socketcommon.py", line 696, in recv_into
    self._wait(self._read_event)
  File "src/gevent/_hub_primitives.py", line 317, in gevent._gevent_c_hub_primitives.wait_on_socket
  File "src/gevent/_hub_primitives.py", line 322, in gevent._gevent_c_hub_primitives.wait_on_socket
  File "src/gevent/_hub_primitives.py", line 304, in gevent._gevent_c_hub_primitives._primitive_wait
  File "src/gevent/_hub_primitives.py", line 46, in gevent._gevent_c_hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_hub_primitives.py", line 46, in gevent._gevent_c_hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_hub_primitives.py", line 55, in gevent._gevent_c_hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_waiter.py", line 154, in gevent._gevent_c_waiter.Waiter.get
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 61, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 65, in gevent._gevent_c_greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_gevent_c_greenlet_primitives.pxd", line 35, in gevent._gevent_c_greenlet_primitives._greenlet_switch
gevent.timeout.Timeout: 0.0 seconds

Any insight is much appreciated!

[DDUFlyme]

Hi, does anyone knows how to figure out this problem？