Modal run with local entrypoint completes, but produces traceback

[rmorgans]

Running an app, using a local_entrypoint that uses a starmap to run remote functions (loading data)

inputs = [(sensor, installation, date) for date in sequential_dates]
    for events_loaded in load_by_installation_date.starmap(inputs):
        print(events_loaded)

The app appears to complete normally but does throw a traceback. Not sure what's going on, thought I would report.

❯ modal run load__detections.py 
✓ Initialized. View run at https://modal.com/apps/XXXX/ap-FVxCHuON0HxpTlLn1cBtBR
✓ Created objects.
├── 🔨 Created mount /Users/rick/Documents/SS/git_checkout/etl/xxx/load__xxx.py
└── 🔨 Created function load_by_installation_date.
1440
Stopping app - local entrypoint completed.
[Thread-1 (thread_inner)] 2024-12-06T21:08:19+1030 Loop attempt for _run_app.<locals>.heartbeat failed
Traceback (most recent call last):
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/_utils/async_utils.py", line 195, in loop_coro
    await asyncio.wait_for(async_f(), timeout=timeout)
  File "/Users/rick/.local/share/uv/python/cpython-3.11.10-macos-aarch64-none/lib/python3.11/asyncio/tasks.py", line 489, in wait_for
    return fut.result()
           ^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/runner.py", line 56, in _heartbeat
    await retry_transient_errors(client.stub.AppHeartbeat, request, attempt_timeout=HEARTBEAT_TIMEOUT)
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/_utils/grpc_utils.py", line 184, in retry_transient_errors
    raise exc
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/_utils/grpc_utils.py", line 178, in retry_transient_errors
    return await fn(*args, metadata=metadata, timeout=timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/client.py", line 396, in __call__
    return await self.client._call_unary(self._wrapped_method_name, req, timeout=timeout, metadata=metadata)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/client.py", line 338, in _call_unary
    return await self._call_safely(coro, grpclib_method.name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/modal/client.py", line 296, in _call_safely
    return await request_task
           ^^^^^^^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/grpclib/client.py", line 904, in __call__
    reply = await stream.recv_message()
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/grpclib/client.py", line 425, in recv_message
    await self.recv_initial_metadata()
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/grpclib/client.py", line 393, in recv_initial_metadata
    self._raise_for_grpc_status(status, message, details)
  File "/Users/rick/.local/share/uv/tools/modal/lib/python3.11/site-packages/grpclib/client.py", line 345, in _raise_for_grpc_status
    raise GRPCError(status, message, details)
grpclib.exceptions.GRPCError: (<Status.FAILED_PRECONDITION: 9>, 'App state is APP_STATE_STOPPED', None)
✓ App completed. View run at https://modal.com/apps/xxx/xxx/ap-FVxCHuON0HxpTlLn1cBtBR

Here's my verson of modal

❯ modal --version
modal client version: 0.67.31

and running on a mac

[mwaskom]

AWAICT this isn't affecting the execution of your App, it's just an ugly traceback on cleanup?

[rmorgans]

Yep - just took me a while to understand it was cleanup not app functionality - potentially disconcerting to new users