Child processes die when request is made for tile with no assets

[JayBigGuy10]

Problem description

I am loading this mosaic json NOAA_Nashville_Tornado.json from /mosaicjson/tiles/WebMercatorQuad/{z}/{x}/{y}@1x?url= on a page with nothing but a leaflet map on it

Whenever the view is not able to be completely filled by the mosaicJson processes die in the docker container

Expected Output

Processes dont randomly die

Environment Information

Docker for windows

docker run --platform=linux/amd64 -p 8000:8000 -e AWS_NO_SIGN_REQUEST=True -e AWS_ACCESS_KEY_ID=xxx -e AWS_SECRET_ACCESS_KEY=xxx --rm -it ghcr.io/developmentseed/titiler:latest uvicorn titiler.application.main:app --host 0.0.0.0 --port 8000 --workers 8

ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/usr/local/lib/python3.12/site-packages/starlette/routing.py", line 75, in app
    response = await f(request)
               ^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/fastapi/routing.py", line 302, in app
    raw_response = await run_endpoint_function(
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/fastapi/routing.py", line 215, in run_endpoint_function
    return await run_in_threadpool(dependant.call, **values)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/starlette/concurrency.py", line 38, in run_in_threadpool
    return await anyio.to_thread.run_sync(func)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 2476, in run_sync_in_worker_thread
    return await future
           ^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 967, in run
    result = context.run(func, *args)
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/titiler/mosaic/factory.py", line 651, in tile
    image, assets = src_dst.tile(
                    ^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/cogeo_mosaic/backends/base.py", line 313, in tile
    raise NoAssetFoundError(f"No assets found for tile {z}-{x}-{y}")
cogeo_mosaic.errors.NoAssetFoundError: No assets found for tile 15-8498-12852

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 403, in run_asgi
    result = await app(  # type: ignore[func-returns-value]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
    return await self.app(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in __call__
    await super().__call__(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/applications.py", line 113, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/middleware/errors.py", line 186, in __call__
    raise exc
  File "/usr/local/lib/python3.12/site-packages/starlette/middleware/errors.py", line 164, in __call__
    await self.app(scope, receive, _send)
  File "/usr/local/lib/python3.12/site-packages/titiler/core/middleware.py", line 57, in __call__
    await self.app(scope, receive, send_wrapper)
  File "/usr/local/lib/python3.12/site-packages/starlette_cramjam/middleware.py", line 121, in __call__
    await responder(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette_cramjam/middleware.py", line 151, in __call__
    await self.app(scope, receive, self.send_with_compression)
  File "/usr/local/lib/python3.12/site-packages/starlette/middleware/cors.py", line 85, in __call__
    await self.app(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 63, in __call__
    await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 53, in wrapped_app
    raise exc
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 42, in wrapped_app
    await app(scope, receive, sender)
  File "/usr/local/lib/python3.12/site-packages/starlette/routing.py", line 716, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/routing.py", line 736, in app
    await route.handle(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/routing.py", line 290, in handle
    await self.app(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/routing.py", line 78, in app
    await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 63, in wrapped_app
    await response(scope, receive, sender)
  File "/usr/local/lib/python3.12/site-packages/starlette/responses.py", line 165, in __call__
    await send({"type": prefix + "http.response.body", "body": self.body})
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 39, in sender
    await send(message)
  File "/usr/local/lib/python3.12/site-packages/starlette/_exception_handler.py", line 39, in sender
    await send(message)
  File "/usr/local/lib/python3.12/site-packages/starlette_cramjam/middleware.py", line 188, in send_with_compression
    await self.send(message)
  File "/usr/local/lib/python3.12/site-packages/titiler/core/middleware.py", line 55, in send_wrapper
    await send(message)
  File "/usr/local/lib/python3.12/site-packages/starlette/middleware/errors.py", line 161, in _send
    await send(message)
  File "/usr/local/lib/python3.12/site-packages/uvicorn/protocols/http/h11_impl.py", line 500, in send
    output = self.conn.send(event=h11.Data(data=data))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/h11/_connection.py", line 538, in send
    data_list = self.send_with_data_passthrough(event)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/h11/_connection.py", line 571, in send_with_data_passthrough
    writer(event, data_list.append)
  File "/usr/local/lib/python3.12/site-packages/h11/_writers.py", line 65, in __call__
    self.send_data(event.data, write)
  File "/usr/local/lib/python3.12/site-packages/h11/_writers.py", line 91, in send_data
    raise LocalProtocolError("Too much data for declared Content-Length")
h11._util.LocalProtocolError: Too much data for declared Content-Length

[vincentsarago]

I can't replicate the issue locally @JayBigGuy10

to me the process doesn't die and the container is still able to handle other requests 🤷