Cannot close a running event loop,when i call run_forever i can't close the loop
Question:
When i stop the websocket thread, i need loop thread stop either, but when i call loop.stop() and loop.close(),some trouble occurred,i can’t close the loop,some issue append, please help me, next it’s my code.
Please!Please!Please!Please!Please!Please!Please!Please!
def start_loop(loop):
"""
start anthor thread and start event loop, general, it's started with app together
return a loop
"""
try:
asyncio.set_event_loop(loop)
loop.run_forever()
except Exception as e:
logger.info(str(e))
this is funtion about create thread and run asyncio loop
def start_loop_thread():
"""_summary_
start anthor thread and start event loop, general, it's started with app together
return a loop
Returns:
Loop: a event loop
"""
loop = asyncio.new_event_loop()
t = threading.Thread(target=start_loop, args=(loop,))
t.setDaemon(True)
t.start()
return loop
async def recv_message(websocket,channel,host_sys_name,command,recv_data_dict):
while True:
recv_ready = channel.recv_ready()
print(f"recv_ready:{recv_ready}")
if channel.recv_ready():
recv_data = bytes_to_str(channel.recv(65535))
recv_data_dict["recv"] = recv_data
print(f"recvrecvrecv:{recv_data_dict}")
if len(recv_data) != 0:
await websocket.send_text(recv_data)
if host_sys_name in recv_data:
break
else:
if host_sys_name in recv_data_dict["recv"]:
break
if "r" in command:
# time.sleep(5)
continue
else:
break
@api_router.websocket("/{client_id}")
async def terminal_websocket_endpoint(websocket: WebSocket, server_info_depends:dict = Depends(get_server_info_depends)):
await websocket.accept()
if server_info_depends.get("code") == 1:
await websocket.send_text(server_info_depends.get("message"))
await websocket.close()
loop = websocket.app.extra.get("loop",None)
# if not loop:
# await websocket.send_text(server_info_depends.get("message"))
# await websocket.close()
ip, port, username, password = server_info_depends.get("ip"),server_info_depends.get("port"),server_info_depends.get("username"),server_info_depends.get("password")
# print(server_info_depends)
ssh = NormalSshClient(ip=ip, port=port, username=username, password=base64_decode(password), websocket=websocket)
ssh.connect()
ssh.get_ssh_channel()
time.sleep(0.1)
host_sys_name = ""
if ssh.channel:
recv = bytes_to_str(ssh.channel.recv(2048))
host_sys_name = get_host_system_name(recv)
await websocket.send_text(recv)
# start new thread
loop = start_loop_thread()
recv_data_dict = {"recv":""}
# loop = asyncio.get_running_loop()
try:
while True:
json_message = await websocket.receive()
size = json_message.get("resize",None)
if size and len(size)==2:
try:
ssh.channel.resize_pty(*size)
except Exception:
pass
if json_message.get("code") == 1005:
ssh.all_close()
loop.stop()
time.sleep(1)
loop.close()
return 0
else:
command = json_message.get("text")
ssh.channel.send(command)
# put coroutine in loop and running
time.sleep(0.01)
future = asyncio.run_coroutine_threadsafe(recv_message(websocket,ssh.channel,host_sys_name,command,recv_data_dict), loop)
except Exception as e:
print(e)
finally:
loop.stop()
time.sleep(1)
loop.close()
When i stop the websocket thread, i need loop thread stop either,but when i call loop.stop() and loop.close(),some trouble occurred
ERROR: Exception in ASGI application
Traceback (most recent call last):
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornprotocolswebsocketswebsockets_impl.py", line 184, in run_asgi
result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmiddlewareproxy_headers.py", line 78, in __call__
return await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapiapplications.py", line 269, in __call__
await super().__call__(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteapplications.py", line 124, in __call__
await self.middleware_stack(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewareerrors.py", line 149, in __call__
await self.app(scope, receive, send)
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2configmiddleware.py", line 52, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewarecors.py", line 76, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteexceptions.py", line 69, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 21, in __call__
raise e
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 670, in __call__
await route.handle(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 325, in handle
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 81, in app
await func(session)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapirouting.py", line 279, in app
await dependant.call(**values)
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2appsterminalws_view.py", line 91, in terminal_websocket_endpoint
loop.close()
File "D:softwarepythonan_3_10libasyncioproactor_events.py", line 677, in close
raise RuntimeError("Cannot close a running event loop")
RuntimeError: Cannot close a running event loop
ERROR 2022-09-16 14:46:21.082 - uvicorn.protocols.websockets.websockets_impl:run_asgi - Exception in ASGI application
Traceback (most recent call last):
File "D:softwarepythonan_3_10librunpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
│ │ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': <_frozen_importlib_external.SourceFileLoader objec...
│ └ <code object <module> at 0x000002057DEEC240, file "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFilesli...
└ <function _run_code at 0x000002057DEDB400>
File "D:softwarepythonan_3_10librunpy.py", line 86, in _run_code
exec(code, run_globals)
│ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': <_frozen_importlib_external.SourceFileLoader objec...
└ <code object <module> at 0x000002057DEEC240, file "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFilesli...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy__main__.py", line 39, in <module>
cli.main()
│ └ <function main at 0x0000020500C9E4D0>
└ <module 'debugpy.server.cli' from 'c:\Users\fhxx\.vscode\extensions\ms-python.python-2022.14.0\pythonFiles\lib\python...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy/..debugpyservercli.py", line 430, in main
run()
└ <function run_file at 0x0000020500C9E290>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy/..debugpyservercli.py", line 284, in run_file
runpy.run_path(target, run_name="__main__")
│ │ └ 'D:\workspace2\python\fanhanprocess_v2\fanhanprocess_v2\main.py'
│ └ <function run_path at 0x0000020500981750>
└ <module '_pydevd_bundle.pydevd_runpy' from 'c:\Users\fhxx\.vscode\extensions\ms-python.python-2022.14.0\pythonFiles\li...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 321, in run_path
return _run_module_code(code, init_globals, run_name,
│ │ │ └ '__main__'
│ │ └ None
│ └ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
└ <function _run_module_code at 0x00000205009813F0>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 135, in _run_module_code
_run_code(code, mod_globals, init_globals,
│ │ │ └ None
│ │ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': None, '__spec__': None, '__file__': 'D:\workspace...
│ └ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
└ <function _run_code at 0x0000020500981000>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 124, in _run_code
exec(code, run_globals)
│ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': None, '__spec__': None, '__file__': 'D:\workspace...
└ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 9, in <module>
uvicorn.run("main:app", host="0.0.0.0", port=8000)
│ └ <function run at 0x000002050196F370>
└ <module 'uvicorn' from 'C:\Users\fhxx\.virtualenvs\fanhanprocess_v2-5XAg7VLT\lib\site-packages\uvicorn\__init__.py'>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmain.py", line 575, in run
server.run()
│ └ <function Server.run at 0x000002050196EDD0>
└ <uvicorn.server.Server object at 0x0000020504156F20>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornserver.py", line 60, in run
return asyncio.run(self.serve(sockets=sockets))
│ │ │ │ └ None
│ │ │ └ <function Server.serve at 0x000002050196EE60>
│ │ └ <uvicorn.server.Server object at 0x0000020504156F20>
│ └ <function run at 0x0000020500DABBE0>
└ <module 'asyncio' from 'D:\software\python\an_3_10\lib\asyncio\__init__.py'>
File "D:softwarepythonan_3_10libasynciorunners.py", line 44, in run
return loop.run_until_complete(main)
│ │ └ <coroutine object Server.serve at 0x000002050435C5F0>
│ └ <function BaseEventLoop.run_until_complete at 0x0000020500DB5630>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciobase_events.py", line 633, in run_until_complete
self.run_forever()
│ └ <function ProactorEventLoop.run_forever at 0x0000020501624430>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciowindows_events.py", line 321, in run_forever
super().run_forever()
File "D:softwarepythonan_3_10libasynciobase_events.py", line 600, in run_forever
self._run_once()
│ └ <function BaseEventLoop._run_once at 0x0000020500DB70A0>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciobase_events.py", line 1896, in _run_once
handle._run()
│ └ <function Handle._run at 0x0000020500D2A3B0>
└ <Handle Task.task_wakeup(<Future finished result=None>)>
File "D:softwarepythonan_3_10libasyncioevents.py", line 80, in _run
self._context.run(self._callback, *self._args)
│ │ │ │ │ └ <member '_args' of 'Handle' objects>
│ │ │ │ └ <Handle Task.task_wakeup(<Future finished result=None>)>
│ │ │ └ <member '_callback' of 'Handle' objects>
│ │ └ <Handle Task.task_wakeup(<Future finished result=None>)>
│ └ <member '_context' of 'Handle' objects>
└ <Handle Task.task_wakeup(<Future finished result=None>)>
> File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornprotocolswebsocketswebsockets_impl.py", line 184, in run_asgi
result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
│ │ │ │ │ │ │ └ <function WebSocketProtocol.asgi_send at 0x0000020504428EE0>
│ │ │ │ │ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ │ │ │ │ └ <function WebSocketProtocol.asgi_receive at 0x0000020504428F70>
│ │ │ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ │ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ └ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x0000020504329660>
└ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmiddlewareproxy_headers.py", line 78, in __call__
return await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.applications.FastAPI object at 0x0000020504329780>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x0000020504329660>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapiapplications.py", line 269, in __call__
await super().__call__(scope, receive, send)
│ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
└ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteapplications.py", line 124, in __call__
await self.middleware_stack(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x00000205044EAAA0>
└ <fastapi.applications.FastAPI object at 0x0000020504329780>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewareerrors.py", line 149, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <config.middleware.CusAuthenticationMiddleware object at 0x00000205044EAA40>
└ <starlette.middleware.errors.ServerErrorMiddleware object at 0x00000205044EAAA0>
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2configmiddleware.py", line 52, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.middleware.cors.CORSMiddleware object at 0x00000205044EA9B0>
└ <config.middleware.CusAuthenticationMiddleware object at 0x00000205044EAA40>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewarecors.py", line 76, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.exceptions.ExceptionMiddleware object at 0x00000205044EA860>
└ <starlette.middleware.cors.CORSMiddleware object at 0x00000205044EA9B0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteexceptions.py", line 69, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.middleware.asyncexitstack.AsyncExitStackMiddleware object at 0x00000205044EA7D0>
└ <starlette.exceptions.ExceptionMiddleware object at 0x00000205044EA860>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 21, in __call__
raise e
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.routing.APIRouter object at 0x00000205043DF070>
└ <fastapi.middleware.asyncexitstack.AsyncExitStackMiddleware object at 0x00000205044EA7D0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 670, in __call__
await route.handle(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <function WebSocketRoute.handle at 0x0000020501F49FC0>
└ <fastapi.routing.APIWebSocketRoute object at 0x0000020504477AC0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 325, in handle
await self.app(scope, receive, send)
INFO 2022-09-16 14:46:21.346 - config.middleware:__call__ - eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6Imx2eWl0YW8iLCJpZCI6NiwiZXhwIjoxNjYzMzEyNzY1fQ.BIG9rZkGpUKTrhWzjkx9gnZ254lVKTAzmsIeRJLnIEc
INFO 2022-09-16 14:46:21.379 - uvicorn.protocols.http.httptools_impl:send - 127.0.0.1:7263 - "GET /api/user/list HTTP/1.1" 200
INFO: connection closed
INFO 2022-09-16 14:46:21.384 - websockets.legacy.server:handler - connection closed
INFO 2022-09-16 14:46:21.388 - uvicorn.protocols.http.httptools_impl:send - 127.0.0.1:7262 - "GET /favicon.ico HTTP/1.1" 200
this is test program,you guys can use it to test
import asyncio
import threading as tg
if __name__ == '__main__':
def start_loop(loop):
asyncio.set_event_loop(loop) # set loop
loop.run_forever()
async def do_some_work(x):
print('Waiting {}'.format(x))
await asyncio.sleep(x)
print('Done after {}s'.format(x))
return x
new_loop = asyncio.new_event_loop()
t = tg.Thread(target=start_loop, args=(new_loop,))
t.daemon = 1
t.start()
print('begin')
tasks=[]
for s in [6,4]:
tasks.append(asyncio.run_coroutine_threadsafe(do_some_work(s), new_loop))
for task in tasks:print(task.result())
new_loop.stop()
print('abc',tg.active_count())
print('end')
new_loop.close()
Answers:
First get all task in loop and then cancel then and finally stop loop
pending = asyncio.all_tasks(loop=loop)
for task in pending:
task.cancel()
group = asyncio.gather(*pending, return_exceptions=True)
loop.run_until_complete(group) # wait for cancel errors complate
loop.close()
I found a solution, add a async function:
async def stop():
loop = asyncio.get_event_loop()
loop.stop()
then execute the function in sub-thread:
asyncio.run_coroutine_threadsafe(stop(), new_loop)
You will not see the same RuntimeError.
I think your code problem is that executing new_loop.stop() in main thread can’t affect the running event loop in sub-thread.
async def stop():
loop = asyncio.get_event_loop()
loop.stop()
loop.close()
asyncio.run_coroutine_threadsafe(stop(), new_loop)
This is little additional remarks, and this is complete answer.
Thanks the other answers and helper.
When i stop the websocket thread, i need loop thread stop either, but when i call loop.stop() and loop.close(),some trouble occurred,i can’t close the loop,some issue append, please help me, next it’s my code.
Please!Please!Please!Please!Please!Please!Please!Please!
def start_loop(loop):
"""
start anthor thread and start event loop, general, it's started with app together
return a loop
"""
try:
asyncio.set_event_loop(loop)
loop.run_forever()
except Exception as e:
logger.info(str(e))
this is funtion about create thread and run asyncio loop
def start_loop_thread():
"""_summary_
start anthor thread and start event loop, general, it's started with app together
return a loop
Returns:
Loop: a event loop
"""
loop = asyncio.new_event_loop()
t = threading.Thread(target=start_loop, args=(loop,))
t.setDaemon(True)
t.start()
return loop
async def recv_message(websocket,channel,host_sys_name,command,recv_data_dict):
while True:
recv_ready = channel.recv_ready()
print(f"recv_ready:{recv_ready}")
if channel.recv_ready():
recv_data = bytes_to_str(channel.recv(65535))
recv_data_dict["recv"] = recv_data
print(f"recvrecvrecv:{recv_data_dict}")
if len(recv_data) != 0:
await websocket.send_text(recv_data)
if host_sys_name in recv_data:
break
else:
if host_sys_name in recv_data_dict["recv"]:
break
if "r" in command:
# time.sleep(5)
continue
else:
break
@api_router.websocket("/{client_id}")
async def terminal_websocket_endpoint(websocket: WebSocket, server_info_depends:dict = Depends(get_server_info_depends)):
await websocket.accept()
if server_info_depends.get("code") == 1:
await websocket.send_text(server_info_depends.get("message"))
await websocket.close()
loop = websocket.app.extra.get("loop",None)
# if not loop:
# await websocket.send_text(server_info_depends.get("message"))
# await websocket.close()
ip, port, username, password = server_info_depends.get("ip"),server_info_depends.get("port"),server_info_depends.get("username"),server_info_depends.get("password")
# print(server_info_depends)
ssh = NormalSshClient(ip=ip, port=port, username=username, password=base64_decode(password), websocket=websocket)
ssh.connect()
ssh.get_ssh_channel()
time.sleep(0.1)
host_sys_name = ""
if ssh.channel:
recv = bytes_to_str(ssh.channel.recv(2048))
host_sys_name = get_host_system_name(recv)
await websocket.send_text(recv)
# start new thread
loop = start_loop_thread()
recv_data_dict = {"recv":""}
# loop = asyncio.get_running_loop()
try:
while True:
json_message = await websocket.receive()
size = json_message.get("resize",None)
if size and len(size)==2:
try:
ssh.channel.resize_pty(*size)
except Exception:
pass
if json_message.get("code") == 1005:
ssh.all_close()
loop.stop()
time.sleep(1)
loop.close()
return 0
else:
command = json_message.get("text")
ssh.channel.send(command)
# put coroutine in loop and running
time.sleep(0.01)
future = asyncio.run_coroutine_threadsafe(recv_message(websocket,ssh.channel,host_sys_name,command,recv_data_dict), loop)
except Exception as e:
print(e)
finally:
loop.stop()
time.sleep(1)
loop.close()
When i stop the websocket thread, i need loop thread stop either,but when i call loop.stop() and loop.close(),some trouble occurred
ERROR: Exception in ASGI application
Traceback (most recent call last):
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornprotocolswebsocketswebsockets_impl.py", line 184, in run_asgi
result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmiddlewareproxy_headers.py", line 78, in __call__
return await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapiapplications.py", line 269, in __call__
await super().__call__(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteapplications.py", line 124, in __call__
await self.middleware_stack(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewareerrors.py", line 149, in __call__
await self.app(scope, receive, send)
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2configmiddleware.py", line 52, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewarecors.py", line 76, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteexceptions.py", line 69, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 21, in __call__
raise e
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 670, in __call__
await route.handle(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 325, in handle
await self.app(scope, receive, send)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 81, in app
await func(session)
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapirouting.py", line 279, in app
await dependant.call(**values)
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2appsterminalws_view.py", line 91, in terminal_websocket_endpoint
loop.close()
File "D:softwarepythonan_3_10libasyncioproactor_events.py", line 677, in close
raise RuntimeError("Cannot close a running event loop")
RuntimeError: Cannot close a running event loop
ERROR 2022-09-16 14:46:21.082 - uvicorn.protocols.websockets.websockets_impl:run_asgi - Exception in ASGI application
Traceback (most recent call last):
File "D:softwarepythonan_3_10librunpy.py", line 196, in _run_module_as_main
return _run_code(code, main_globals, None,
│ │ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': <_frozen_importlib_external.SourceFileLoader objec...
│ └ <code object <module> at 0x000002057DEEC240, file "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFilesli...
└ <function _run_code at 0x000002057DEDB400>
File "D:softwarepythonan_3_10librunpy.py", line 86, in _run_code
exec(code, run_globals)
│ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': <_frozen_importlib_external.SourceFileLoader objec...
└ <code object <module> at 0x000002057DEEC240, file "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFilesli...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy__main__.py", line 39, in <module>
cli.main()
│ └ <function main at 0x0000020500C9E4D0>
└ <module 'debugpy.server.cli' from 'c:\Users\fhxx\.vscode\extensions\ms-python.python-2022.14.0\pythonFiles\lib\python...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy/..debugpyservercli.py", line 430, in main
run()
└ <function run_file at 0x0000020500C9E290>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy/..debugpyservercli.py", line 284, in run_file
runpy.run_path(target, run_name="__main__")
│ │ └ 'D:\workspace2\python\fanhanprocess_v2\fanhanprocess_v2\main.py'
│ └ <function run_path at 0x0000020500981750>
└ <module '_pydevd_bundle.pydevd_runpy' from 'c:\Users\fhxx\.vscode\extensions\ms-python.python-2022.14.0\pythonFiles\li...
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 321, in run_path
return _run_module_code(code, init_globals, run_name,
│ │ │ └ '__main__'
│ │ └ None
│ └ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
└ <function _run_module_code at 0x00000205009813F0>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 135, in _run_module_code
_run_code(code, mod_globals, init_globals,
│ │ │ └ None
│ │ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': None, '__spec__': None, '__file__': 'D:\workspace...
│ └ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
└ <function _run_code at 0x0000020500981000>
File "c:Usersfhxx.vscodeextensionsms-python.python-2022.14.0pythonFileslibpythondebugpy_vendoredpydevd_pydevd_bundlepydevd_runpy.py", line 124, in _run_code
exec(code, run_globals)
│ └ {'__name__': '__main__', '__doc__': None, '__package__': '', '__loader__': None, '__spec__': None, '__file__': 'D:\workspace...
└ <code object <module> at 0x0000020500CECB30, file "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 1>
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2main.py", line 9, in <module>
uvicorn.run("main:app", host="0.0.0.0", port=8000)
│ └ <function run at 0x000002050196F370>
└ <module 'uvicorn' from 'C:\Users\fhxx\.virtualenvs\fanhanprocess_v2-5XAg7VLT\lib\site-packages\uvicorn\__init__.py'>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmain.py", line 575, in run
server.run()
│ └ <function Server.run at 0x000002050196EDD0>
└ <uvicorn.server.Server object at 0x0000020504156F20>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornserver.py", line 60, in run
return asyncio.run(self.serve(sockets=sockets))
│ │ │ │ └ None
│ │ │ └ <function Server.serve at 0x000002050196EE60>
│ │ └ <uvicorn.server.Server object at 0x0000020504156F20>
│ └ <function run at 0x0000020500DABBE0>
└ <module 'asyncio' from 'D:\software\python\an_3_10\lib\asyncio\__init__.py'>
File "D:softwarepythonan_3_10libasynciorunners.py", line 44, in run
return loop.run_until_complete(main)
│ │ └ <coroutine object Server.serve at 0x000002050435C5F0>
│ └ <function BaseEventLoop.run_until_complete at 0x0000020500DB5630>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciobase_events.py", line 633, in run_until_complete
self.run_forever()
│ └ <function ProactorEventLoop.run_forever at 0x0000020501624430>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciowindows_events.py", line 321, in run_forever
super().run_forever()
File "D:softwarepythonan_3_10libasynciobase_events.py", line 600, in run_forever
self._run_once()
│ └ <function BaseEventLoop._run_once at 0x0000020500DB70A0>
└ <ProactorEventLoop running=True closed=False debug=False>
File "D:softwarepythonan_3_10libasynciobase_events.py", line 1896, in _run_once
handle._run()
│ └ <function Handle._run at 0x0000020500D2A3B0>
└ <Handle Task.task_wakeup(<Future finished result=None>)>
File "D:softwarepythonan_3_10libasyncioevents.py", line 80, in _run
self._context.run(self._callback, *self._args)
│ │ │ │ │ └ <member '_args' of 'Handle' objects>
│ │ │ │ └ <Handle Task.task_wakeup(<Future finished result=None>)>
│ │ │ └ <member '_callback' of 'Handle' objects>
│ │ └ <Handle Task.task_wakeup(<Future finished result=None>)>
│ └ <member '_context' of 'Handle' objects>
└ <Handle Task.task_wakeup(<Future finished result=None>)>
> File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornprotocolswebsocketswebsockets_impl.py", line 184, in run_asgi
result = await self.app(self.scope, self.asgi_receive, self.asgi_send)
│ │ │ │ │ │ │ └ <function WebSocketProtocol.asgi_send at 0x0000020504428EE0>
│ │ │ │ │ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ │ │ │ │ └ <function WebSocketProtocol.asgi_receive at 0x0000020504428F70>
│ │ │ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ │ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ │ └ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
│ └ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x0000020504329660>
└ <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000020504577A60>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesuvicornmiddlewareproxy_headers.py", line 78, in __call__
return await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.applications.FastAPI object at 0x0000020504329780>
└ <uvicorn.middleware.proxy_headers.ProxyHeadersMiddleware object at 0x0000020504329660>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapiapplications.py", line 269, in __call__
await super().__call__(scope, receive, send)
│ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
└ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteapplications.py", line 124, in __call__
await self.middleware_stack(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.middleware.errors.ServerErrorMiddleware object at 0x00000205044EAAA0>
└ <fastapi.applications.FastAPI object at 0x0000020504329780>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewareerrors.py", line 149, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <config.middleware.CusAuthenticationMiddleware object at 0x00000205044EAA40>
└ <starlette.middleware.errors.ServerErrorMiddleware object at 0x00000205044EAAA0>
File "D:workspace2pythonfanhanprocess_v2fanhanprocess_v2configmiddleware.py", line 52, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.middleware.cors.CORSMiddleware object at 0x00000205044EA9B0>
└ <config.middleware.CusAuthenticationMiddleware object at 0x00000205044EAA40>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarlettemiddlewarecors.py", line 76, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <starlette.exceptions.ExceptionMiddleware object at 0x00000205044EA860>
└ <starlette.middleware.cors.CORSMiddleware object at 0x00000205044EA9B0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletteexceptions.py", line 69, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.middleware.asyncexitstack.AsyncExitStackMiddleware object at 0x00000205044EA7D0>
└ <starlette.exceptions.ExceptionMiddleware object at 0x00000205044EA860>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 21, in __call__
raise e
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesfastapimiddlewareasyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <fastapi.routing.APIRouter object at 0x00000205043DF070>
└ <fastapi.middleware.asyncexitstack.AsyncExitStackMiddleware object at 0x00000205044EA7D0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 670, in __call__
await route.handle(scope, receive, send)
│ │ │ │ └ <bound method WebSocketProtocol.asgi_send of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0000...
│ │ │ └ <bound method WebSocketProtocol.asgi_receive of <uvicorn.protocols.websockets.websockets_impl.WebSocketProtocol object at 0x0...
│ │ └ {'type': 'websocket', 'asgi': {'version': '3.0', 'spec_version': '2.3'}, 'http_version': '1.1', 'scheme': 'ws', 'server': ('1...
│ └ <function WebSocketRoute.handle at 0x0000020501F49FC0>
└ <fastapi.routing.APIWebSocketRoute object at 0x0000020504477AC0>
File "C:Usersfhxx.virtualenvsfanhanprocess_v2-5XAg7VLTlibsite-packagesstarletterouting.py", line 325, in handle
await self.app(scope, receive, send)
INFO 2022-09-16 14:46:21.346 - config.middleware:__call__ - eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6Imx2eWl0YW8iLCJpZCI6NiwiZXhwIjoxNjYzMzEyNzY1fQ.BIG9rZkGpUKTrhWzjkx9gnZ254lVKTAzmsIeRJLnIEc
INFO 2022-09-16 14:46:21.379 - uvicorn.protocols.http.httptools_impl:send - 127.0.0.1:7263 - "GET /api/user/list HTTP/1.1" 200
INFO: connection closed
INFO 2022-09-16 14:46:21.384 - websockets.legacy.server:handler - connection closed
INFO 2022-09-16 14:46:21.388 - uvicorn.protocols.http.httptools_impl:send - 127.0.0.1:7262 - "GET /favicon.ico HTTP/1.1" 200
this is test program,you guys can use it to test
import asyncio
import threading as tg
if __name__ == '__main__':
def start_loop(loop):
asyncio.set_event_loop(loop) # set loop
loop.run_forever()
async def do_some_work(x):
print('Waiting {}'.format(x))
await asyncio.sleep(x)
print('Done after {}s'.format(x))
return x
new_loop = asyncio.new_event_loop()
t = tg.Thread(target=start_loop, args=(new_loop,))
t.daemon = 1
t.start()
print('begin')
tasks=[]
for s in [6,4]:
tasks.append(asyncio.run_coroutine_threadsafe(do_some_work(s), new_loop))
for task in tasks:print(task.result())
new_loop.stop()
print('abc',tg.active_count())
print('end')
new_loop.close()
First get all task in loop and then cancel then and finally stop loop
pending = asyncio.all_tasks(loop=loop)
for task in pending:
task.cancel()
group = asyncio.gather(*pending, return_exceptions=True)
loop.run_until_complete(group) # wait for cancel errors complate
loop.close()
I found a solution, add a async function:
async def stop():
loop = asyncio.get_event_loop()
loop.stop()
then execute the function in sub-thread:
asyncio.run_coroutine_threadsafe(stop(), new_loop)
You will not see the same RuntimeError.
I think your code problem is that executing new_loop.stop() in main thread can’t affect the running event loop in sub-thread.
async def stop():
loop = asyncio.get_event_loop()
loop.stop()
loop.close()
asyncio.run_coroutine_threadsafe(stop(), new_loop)
This is little additional remarks, and this is complete answer.
Thanks the other answers and helper.