FAISS component seems to be producing a runtime error with 1.1.3

[bsleuth]

RuntimeError: Error in faiss::FileIOReader::FileIOReader(const char*) at                 
                             /project/faiss/faiss/impl/io.cpp:67: Error: 'f' failed: could not open                   
                             /home/xxx/LangFlow/test/index.faiss for reading: No such file or             
                             directory 

I would expect the component to create the directory if it does not exist? This does seem like an issue after upgrading from 1.1.1 - don't know whether I am missing something...

I am starting langflow from the LangFlow directory on Ubuntu 24

[dosubot]

Hey @bsleuth! I'm here to help you with any bugs, questions, or contributions you have in mind. Let's tackle this issue together!

The runtime error you're encountering is due to the persist_directory not being specified or the directory not existing. The FAISS component in LangFlow requires a valid directory to save or load the FAISS index, and it does not automatically create the directory if it does not exist. You need to manually create the directory specified in persist_directory before starting LangFlow to avoid this error ^[1].

To continue talking to Dosu, mention @dosu.

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[bsleuth]

@dosu

The persist directory exists as 'test' and the index name is provided as 'index'.

If I create the directory manually I get:

RuntimeError: Error in faiss::FileIOReader::FileIOReader(const char*) at
/project/faiss/faiss/impl/io.cpp:67: Error: 'f' failed: could not open
/home/xxx/LangFlow/test/index.faiss for reading: No such file or
directory

[dosubot]

The error you're encountering suggests that the FAISS component is trying to read an index file that doesn't exist at the specified path. Here are a few things to check:

1. File Path: Ensure that the file path is correctly specified. The FAISS component expects the file path in the format <resolved_folder_path>/<index_name>. In your case, it should be /home/xxx/LangFlow/test/index (without the .faiss extension) ^[1].

2. File Existence: Verify that the file index actually exists in the test directory. If the file is missing, you'll need to create or save the FAISS index first before attempting to load it.

3. Permissions: Check the file and directory permissions to ensure that the process running LangFlow has the necessary read and write permissions for the directory and file.

If the file doesn't exist, you might need to run the process that creates and saves the FAISS index before attempting to load it. If the issue persists, double-check the configuration settings and ensure that the persist_directory and index_name are correctly set.

To continue talking to Dosu, mention @dosu.

---

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[bsleuth]

I think there is something wrong. Could someone please help?

[Cristhianzl]

hi @bsleuth,

The component is failing due to path resolution issues after becoming outdated. Please review PR #6081 for the fix.