Parallel request getting merged

[saireddy12]

I created a API using fastapi. the API accepts a audio file and text , the audio and text are related to each other and also the text is used till the end of all operations in the API

async def create_file(upload_file:UploadFile = File(...),email: str = Form(...),text:str=Form(...)):
     some operations
     subprocess.popen(cmd)
    stdout, stderr = process.communicate()

now when 2 users try to hit the API at the same time the request of 1st user is getting modified and the user 2 response is returned to both the users.
How can i solve this and also the API is on aws with 2 cores linux fedora os
I am using gunicorn to host it and to run it on two cores
gunicorn -w 2 --reload --bind 0.0.0.0:8080 --capture-output --error-logfile error_log.txt --access-logfile log.txt -k uvicorn.workers.UvicornWorker main:app
and is it possible to run 2 requests parallel y on two cores independently ?

[hhamana]

You are experiencing a race condition.
To avoid those easily, you should make sure the file name of the audio file you generate/save is unique, so they do not write to the same file.
Even better, if you can avoid it, try to work on it in-memory (from io import ByteIO) , so you do not have the performance cost from writing to a physical disk.

[tiangolo]

Thanks for the help @hhamana! 🍰

If that solves your problem @saireddy12, you can close the issue. ☕

Sorry for the long delay! 🙈 I wanted to personally address each issue/PR and they piled up through time, but now I'm checking each one in order.

[github-actions]

Assuming the original need was handled, this will be automatically closed now. But feel free to add more comments or create new issues or PRs.