[BUG]: RDS Postgres DB, local docker, Phoenix won't start

[Mosquid]

Describe the bug
I had a docker compose with a local postgres that I've been using for my local dev environment. Once I changed the connection string to a remote DB (AWS RDS Postgres), my Phoenix container won't start.

To Reproduce
Steps to reproduce the behavior:

1. Create a docker-compose file

phoenix:
    image: arizephoenix/phoenix:latest 
    ports:
      - 6006:6006
      - 4317:4317
    environment:
       - PHOENIX_SQL_DATABASE_URL=<RDS postgres connection string>

2. run docker compose up
3. See error

INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:6006 (Press CTRL+C to quit)
ERROR:    Traceback (most recent call last):
  File "/phoenix/env/phoenix/server/app.py", line 508, in lifespan
    yield {
  File "/phoenix/env/fastapi/routing.py", line 138, in merged_lifespan
    yield {**(maybe_nested_state or {}), **(maybe_original_state or {})}
  File "/phoenix/env/fastapi/routing.py", line 138, in merged_lifespan
    yield {**(maybe_nested_state or {}), **(maybe_original_state or {})}
  File "/phoenix/env/fastapi/routing.py", line 138, in merged_lifespan
    yield {**(maybe_nested_state or {}), **(maybe_original_state or {})}
  [Previous line repeated 1 more time]
  File "/phoenix/env/starlette/routing.py", line 700, in lifespan
    await receive()
  File "/phoenix/env/uvicorn/lifespan/on.py", line 137, in receive
    return await self.receive_queue.get()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/asyncio/queues.py", line 158, in get
    await getter
asyncio.exceptions.CancelledError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/phoenix/env/starlette/routing.py", line 693, in lifespan
    async with self.lifespan_context(app) as maybe_state:
  File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__
    await self.gen.athrow(typ, value, traceback)
  File "/phoenix/env/fastapi/routing.py", line 133, in merged_lifespan
    async with original_context(app) as maybe_original_state:
  File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__
    await self.gen.athrow(typ, value, traceback)
  File "/phoenix/env/fastapi/routing.py", line 133, in merged_lifespan
    async with original_context(app) as maybe_original_state:
  File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__
    await self.gen.athrow(typ, value, traceback)
  File "/phoenix/env/fastapi/routing.py", line 133, in merged_lifespan
    async with original_context(app) as maybe_original_state:
  File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__
    await self.gen.athrow(typ, value, traceback)
  File "/phoenix/env/fastapi/routing.py", line 133, in merged_lifespan
    async with original_context(app) as maybe_original_state:
  File "/usr/lib/python3.11/contextlib.py", line 222, in __aexit__
    await self.gen.athrow(typ, value, traceback)
  File "/phoenix/env/phoenix/server/app.py", line 482, in lifespan
    async with AsyncExitStack() as stack:
  File "/usr/lib/python3.11/contextlib.py", line 733, in __aexit__
    raise exc_details[1]
  File "/usr/lib/python3.11/contextlib.py", line 716, in __aexit__
    cb_suppress = await cb(*exc_details)
                  ^^^^^^^^^^^^^^^^^^^^^^
  File "/phoenix/env/phoenix/server/grpc_server.py", line 97, in __aexit__
    await self._server.stop(5)
  File "/phoenix/env/grpc/aio/_server.py", line 159, in stop
    await self._server.shutdown(grace)
  File "src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi", line 1065, in shutdown
  File "src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi", line 1069, in grpc._cython.cygrpc.AioServer.shutdown
  File "src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi", line 1049, in _start_shutting_down
  File "src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi", line 980, in _server_main_loop
  File "src/python/grpcio/grpc/_cython/_cygrpc/aio/server.pyx.pxi", line 959, in _request_call
asyncio.exceptions.CancelledError

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Environment (please complete the following information):

• OS: MacOS
• Notebook Runtime [e.g. Jupyter, Colab]
• Browser [e.g. chrome, safari]
• Version latest

Additional context
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[axiomofjoy]

Hey @Mosquid, have you verified that you are able to connect to your Postgres instance using the same connection string, for example, using psql or a similar tool?

[Mosquid]

Hey @axiomofjoy,

Thanks. Yes, I checked it with pg_isready and got accepting connections.

[axiomofjoy]

Hey @Mosquid, sorry you're hitting this issue. We're not clear what's going. Can you try disabling your gRPC server via the following flag and see if anything changes?

phoenix --read-only serve