How to debug v2.1.0?

[komposter]

Describe the bug

I used to debug backend-api by simple adding this:

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app=app, host="0.0.0.0", port=8000)

to the main.py, PyCharm allowed me to stop on break-points, evaluate expressions, etc.

But after update to v2.1.0, it fails with RuntimeError: no running event loop error:

Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1078, in _handle_fromlist
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/Users/komposter/dev/emporus-hummingbot-backend-api/routers/manage_backtesting.py", line 12, in <module>
    backtesting_engine = BacktestingEngineBase()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/hummingbot/strategy_v2/backtesting/backtesting_engine_base.py", line 36, in __init__
    self.backtesting_data_provider = BacktestingDataProvider(connectors={})
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/hummingbot/strategy_v2/backtesting/backtesting_data_provider.py", line 37, in __init__
    self.connectors = {name: self.get_connector(name) for name, settings in self.conn_settings.items()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/hummingbot/strategy_v2/backtesting/backtesting_data_provider.py", line 37, in <dictcomp>
    self.connectors = {name: self.get_connector(name) for name, settings in self.conn_settings.items()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/hummingbot/strategy_v2/backtesting/backtesting_data_provider.py", line 55, in get_connector
    connector = connector_class(**init_params)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/hummingbot/connector/exchange/ndax/ndax_exchange.py", line 96, in __init__
    self._shared_client = aiohttp.ClientSession()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/aiohttp/client.py", line 310, in __init__
    loop = loop or asyncio.get_running_loop()
RuntimeError: no running event loop

It fails with the same error if I run it asynchronously:

if __name__ == "__main__":
    import uvicorn
    import asyncio

    asyncio.run(uvicorn.run(app, host="127.0.0.1", port=8000, log_level="info"))

I've made it run by adding a return in the very beginning of the __init__ function of the /site-packages/hummingbot/connector/exchange/ndax/ndax_exchange.py.

But it still fails on requests from a dashboard:

INFO:     127.0.0.1:56876 - "GET /is-docker-running HTTP/1.1" 500 Internal Server Error
ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py", line 409, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    return await self.app(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/middleware/errors.py", line 187, in __call__
    raise exc
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/middleware/errors.py", line 165, in __call__
    await self.app(scope, receive, _send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 62, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/routing.py", line 715, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/routing.py", line 735, in app
    await route.handle(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/routing.py", line 288, in handle
    await self.app(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/routing.py", line 76, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/routing.py", line 73, in app
    response = await f(request)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/fastapi/routing.py", line 291, in app
    solved_result = await solve_dependencies(
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/fastapi/dependencies/utils.py", line 640, in solve_dependencies
    solved = await run_in_threadpool(call, **solved_result.values)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/starlette/concurrency.py", line 39, in run_in_threadpool
    return await anyio.to_thread.run_sync(func, *args)
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2469, in run_sync_in_worker_thread
    async with limiter or cls.current_default_thread_limiter():
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 1982, in __aenter__
    await self.acquire()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2036, in acquire
    return await self.acquire_on_behalf_of(current_task())
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2039, in acquire_on_behalf_of
    await AsyncIOBackend.checkpoint_if_cancelled()
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2372, in checkpoint_if_cancelled
    cancel_scope = _task_states[task].cancel_scope
  File "/Users/komposter/miniconda3/envs/backend-api/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 686, in __getitem__
    assert isinstance(key, asyncio.Task)
AssertionError

What could be a solution? How to debug it now?

Steps to reproduce bug

1. Download and install backend-api v2.1.0
2. Add this to the main.py:

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app=app, host="0.0.0.0", port=8000)

3. Try to run/debug in PyCharm.

Thanks for your great job!