with the

--production

flag i do get the stack trace

was forcefully doing division by zero for test, and with

--production

flag i do get details in console as

2023-02-03T06:56:27+0000 [INFO] [api_server:8] 127.0.0.1:55594 (scheme=http,method=POST,path=/analyze,type=application/json,length=149) (status=500,type=text/plain; charset=utf-8,length=21) 97.182ms (trace=53fd6cfc50ce4671570c3abe9e51adf4,span=01ebb174a954d196,sampled=0)
2023-02-03T06:56:27+0000 [ERROR] [api_server:8] Exception in ASGI application
Traceback (most recent call last):
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/uvicorn/protocols/http/h11_impl.py", line 407, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/uvicorn/middleware/proxy_headers.py", line 78, in __call__
    return await <http://self.app|self.app>(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/uvicorn/middleware/message_logger.py", line 86, in __call__
    raise exc from None
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/uvicorn/middleware/message_logger.py", line 82, in __call__
    await <http://self.app|self.app>(scope, inner_receive, inner_send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/applications.py", line 124, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/errors.py", line 184, in __call__
    raise exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/errors.py", line 162, in __call__
    await <http://self.app|self.app>(scope, receive, _send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/bentoml/_internal/server/http/instruments.py", line 176, in __call__
    await <http://self.app|self.app>(scope, receive, wrapped_send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/opentelemetry/instrumentation/asgi/__init__.py", line 581, in __call__
    await <http://self.app|self.app>(scope, otel_receive, otel_send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/bentoml/_internal/server/http/access.py", line 126, in __call__
    await <http://self.app|self.app>(scope, receive, wrapped_send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 79, in __call__
    raise exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 68, in __call__
    await <http://self.app|self.app>(scope, receive, sender)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/routing.py", line 706, in __call__
    await route.handle(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/routing.py", line 443, in handle
    await <http://self.app|self.app>(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/fastapi/applications.py", line 270, in __call__
    await super().__call__(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/applications.py", line 124, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/errors.py", line 184, in __call__
    raise exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/errors.py", line 162, in __call__
    await <http://self.app|self.app>(scope, receive, _send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 106, in __call__
    response = await self.dispatch_func(request, call_next)
  File "/home/ubuntu/VideaCode/mito-ml/app/middleware/auth/auth_middleware.py", line 71, in authenticate
    response = await call_next(request)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 80, in call_next
    raise app_exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 69, in coro
    await <http://self.app|self.app>(scope, receive_or_disconnect, send_no_error)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 106, in __call__
    response = await self.dispatch_func(request, call_next)
  File "/home/ubuntu/VideaCode/mito-ml/app/middleware/request_context/request_context_middleware.py", line 31, in dispatch
    response = await call_next(request)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 80, in call_next
    raise app_exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/base.py", line 69, in coro
    await <http://self.app|self.app>(scope, receive_or_disconnect, send_no_error)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/cors.py", line 84, in __call__
    await <http://self.app|self.app>(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 79, in __call__
    raise exc
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/middleware/exceptions.py", line 68, in __call__
    await <http://self.app|self.app>(scope, receive, sender)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/fastapi/middleware/asyncexitstack.py", line 21, in __call__
    raise e
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/fastapi/middleware/asyncexitstack.py", line 18, in __call__
    await <http://self.app|self.app>(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/routing.py", line 706, in __call__
    await route.handle(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/routing.py", line 276, in handle
    await <http://self.app|self.app>(scope, receive, send)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/starlette/routing.py", line 66, in app
    response = await func(request)
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/fastapi/routing.py", line 237, in app
    raw_response = await run_endpoint_function(
  File "/opt/conda/envs/mito-ml-env/lib/python3.10/site-packages/fastapi/routing.py", line 163, in run_endpoint_function
    return await dependant.call(**values)
  File "/home/ubuntu/VideaCode/mito-ml/app/routes/infer_routes.py", line 20, in predict
    b = 1 / 0
ZeroDivisionError: division by zero

while without the flag the output is just,

2023-02-03T06:55:40+0000 [INFO] [dev_api_server] 127.0.0.1:41296 (scheme=http,method=POST,path=/analyze,type=application/json,length=149) (status=500,type=text/plain; charset=utf-8,length=21) 92.042ms (trace=67d09af3c1b1b7bf20d0bd61b1d79d09,span=bc094537e70036f9,sampled=0)

@Jiang any additional details on above case?