Killing main process doesn't kill the workers

[LucaNicosia]

Description

Hi everyone.

I'm building a REST server using FAST-API + gunicorn with uvicorn workers (didn't test with other worker classes)

I started sending process kills to the processes to see how it behaves.

I noticed that the workers are spawned right away after the are killed (as expected)

Killing the main process instead, causes the workers to stay alive.

Is there a way to fix this problem?

How to reproduce

1. Start gunicorn application
2. Kill smallest pid
3. Asses the workers are still running

[benoitc]

which command do you send for kill ?

[LucaNicosia]

Hi @benoitc

I'm using kill -9 . Here a dump of the terminal of a gunicorn server with 2 workers

~ ❯ ps -a | grep my-rest-server                                                                                                                                                                                                                                                  10:53:28
  70609 pts/6    00:00:05 my-rest-server
  70651 pts/6    00:00:01 my-rest-server
  70653 pts/6    00:00:01 my-rest-server
~ ❯ kill -9 70609                                                                                                                                                                                                                                                                10:53:55
~ ❯ ps -a | grep my-rest-server                                                                                                                                                                                                                                                  10:54:15
  70651 pts/6    00:00:01 my-rest-server
  70653 pts/6    00:00:01 my-rest-server

As you can see the workers are still alive

I'm on gunicorn 25.1.0

Side note: I noticed dirty arbiter and dirty workers are killed correctly when the main process is killed

[LucaNicosia]

Here the app I'm using

# -- app.py --
"""FastAPI application for gunicorn server."""
from fastapi import FastAPI

app = FastAPI()


@app.get("/test")
async def test_endpoint():
    """Test endpoint."""
    return {"message": "Test endpoint is working"}

# -- gunicorn_config.py --
"""Gunicorn configuration file."""

# Server socket
bind = "0.0.0.0:8000"
backlog = 2048

# Worker processes
workers = 2
worker_class = "uvicorn.workers.UvicornWorker"
worker_connections = 1000
timeout = 30
keepalive = 2

# Logging
accesslog = "-"
errorlog = "-"
loglevel = "info"

# Process naming
proc_name = "gunicorn_fastapi_server"

# Server mechanics
daemon = False
pidfile = None
umask = 0
user = None
group = None
tmp_upload_dir = None

I run it using the command gunicorn app:app -c gunicorn_config.py

[LucaNicosia]

Any updates on this?