Faiss Write Index Issue on Using with Docker FastAPI

[debanshu08]

I have a FastAPI Docker Image where in the startup section I am fetching the binary version of my FAISS index from Redis, unpickling it using pickle.loads and then using

file_path = os.path.join(folder_path, 'index.faiss') faiss.write_index(faissModelFromRedis,file_path)

to write it to a file. This works in local, but when deployed using Docker to Azure Web App it throws File "/app/main.py", line 38, in loadModelAndSetRetriever 2024-01-27T14:03:27.547507225Z faiss.write_index(faiss_model,file_path) 2024-01-27T14:03:27.547510425Z File "/usr/local/lib/python3.8/site-packages/faiss/swigfaiss_avx2.py", line 10200, in write_index 2024-01-27T14:03:27.547513825Z return _swigfaiss_avx2.write_index(*args) 2024-01-27T14:03:27.547517125Z TypeError: Wrong number or type of arguments for overloaded function 'write_index'. 2024-01-27T14:03:27.547520225Z Possible C/C++ prototypes are: 2024-01-27T14:03:27.547523325Z faiss::write_index(faiss::Index const *,char const *) 2024-01-27T14:03:27.547526526Z faiss::write_index(faiss::Index const *,FILE *) 2024-01-27T14:03:27.547529526Z faiss::write_index(faiss::Index const *,faiss::IOWriter *)

How can we resolve this?

I tried to use pickle.dumps but with Faiss, it is unable to read_index of the saved file.

Also tried to add chmod 777 or new user add command in Dockerfile thinking it's a write access issue from faiss.