Bug FileNotFoundError Errno 2 No Such File Or Directory Xxx Troubleshooting Guide

by Sharif Sakr 82 views

Introduction

Hey guys, we've got a bug report here about a FileNotFoundError popping up when trying to parse files in RAGFlow. It seems like some users are running into an issue where the system can't find the file they're trying to work with, even after it appears to have been added successfully. This can be a real headache, so let's dive into the details and see what's going on and how we can fix it.

Bug Report Overview

The issue reported is a FileNotFoundError: [Errno 2] No such file or directory which occurs during the parsing process after a file is added to the knowledge base. The user noticed that while the file addition appeared successful, the parsing step failed, and the logs pointed to Redis connection issues and the file not being found. Additionally, the user mentioned not seeing the files in MinIO, suggesting a potential storage problem.

Self Checks

The user has confirmed the following self-checks:

  • Searched for existing issues, including closed ones.
  • Confirmed using English to submit the report.
  • Acknowledged the policy against non-English submissions.
  • Did not modify the issue template and filled in all required fields.

RAGFlow Environment Details

  • RAGFlow workspace code commit ID: 887651e
  • RAGFlow image version: v0.19.1
  • Hardware parameters: Docker
  • OS type: Ubuntu

Actual Behavior

The user attempted to add a file to the knowledge base. The user encountered a FileNotFoundError during parsing, even though the addition process seemed successful initially. The error message indicates that the system could not find the specified file: '凡人修仙传(1-500章).txt'. Further investigation of the logs revealed issues with Redis, specifically errors related to setting and getting data, suggesting potential authentication problems or connectivity issues with the Redis server.

[WARNING] [2025-07-26 09:57:58,162] [redis_conn.set] [line:51]: [EXCEPTION]setb6860c6e696f11f088430242ac150006/凡人修仙传(1-500章).txt||invalid username-password pair or user is disabled.
[WARNING] [2025-07-26 09:57:58,451] [redis_conn.get] [line:34]: [EXCEPTION]getb6860c6e696f11f088430242ac150006/凡人修仙传(1-500章).txt||invalid username-password pair or user is disabled.
Traceback (most recent call last):
File "/ragflow/rag/svr/task_executor.py", line 137, in build
cks = chunker.chunk(row["name"], binary=binary, from_page=row["from_page"],
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/ragflow/rag/app/naive.py", line 146, in chunk
with open(filename, "r") as f:
^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '凡人修仙传(1-500章).txt'

Another important observation is that the user didn't find any files in MinIO, which could indicate a problem with file storage or uploading. This could be a critical piece of the puzzle, suggesting the file might not have been stored correctly in the first place.

Expected Behavior

The expected behavior is that the file should be parsed without errors after being successfully added to the knowledge base. This means the system should be able to locate and access the file during the parsing process, and any Redis-related operations should work seamlessly.

Steps to Reproduce

To reproduce the issue, the user provided the following steps:

  1. Use the docker-compose-gpu-CN-oc9.yml configuration.
  2. Log in to the system.
  3. Add a file to the knowledge base.
  4. Observe the parsing process failing with a FileNotFoundError.

Root Cause Analysis

Redis Connection Issues

The logs indicate problems with Redis, showing invalid username-password pair or user is disabled errors. This suggests a potential misconfiguration or authentication issue with the Redis server. If RAGFlow can't connect to Redis properly, it might not be able to store or retrieve necessary metadata about the files, which could indirectly lead to parsing failures.

File Storage in MinIO

The user's observation about the absence of files in MinIO is crucial. If the files aren't being stored in MinIO as expected, it directly explains the FileNotFoundError. There could be issues with the MinIO configuration, upload process, or permissions that are preventing files from being saved correctly. This is a primary area to investigate.

File Path Resolution

The FileNotFoundError itself points to the system's inability to locate the file using the provided path. This could be due to several reasons:

  • Incorrect file path: The path used during parsing might be incorrect or not properly constructed.
  • File not being uploaded: As mentioned earlier, if the file wasn't uploaded to MinIO, it wouldn't exist at the expected path.
  • Permissions issue: The RAGFlow application might not have the necessary permissions to access the file, even if it exists.

Character Encoding

The filename '凡人修仙传(1-500章).txt' contains Chinese characters. It's possible that there are encoding issues when handling such filenames, especially if the system isn't configured to handle Unicode characters correctly. This could lead to the file being stored or retrieved with a mangled name, causing the file not to be found during parsing.

Proposed Solutions

Verify Redis Configuration

First and foremost, we need to ensure that the Redis configuration is correct. This involves checking the following:

  • Credentials: Make sure the username and password used by RAGFlow to connect to Redis are correct and that the user account is enabled.
  • Connection details: Verify the Redis host, port, and any other connection parameters are properly configured.
  • Redis server status: Ensure the Redis server is running and accessible from the RAGFlow environment. Restarting the Redis service might be a quick way to resolve temporary connectivity issues.

Investigate MinIO Storage

We need to confirm that files are being stored in MinIO correctly. Here’s how we can do that:

  • Check MinIO logs: Examine the MinIO logs for any errors or warnings related to file uploads or storage. This can give us clues about what might be going wrong.
  • Verify bucket configuration: Ensure the MinIO bucket is correctly configured and that RAGFlow has the necessary permissions to write to it.
  • Manually upload a file: Try manually uploading a file to MinIO to see if it works. This can help isolate whether the issue is with RAGFlow’s upload process or MinIO itself.

Debug File Path Resolution

We need to ensure that the file path used during parsing is correct. Here’s what we can do:

  • Log the file path: Add logging statements in the RAGFlow code to print the file path being used during parsing. This will help us see if the path is being constructed correctly.
  • Check for typos: Double-check the filename and path for any typos or inconsistencies.
  • Verify file existence: Before attempting to open the file, add a check to ensure it exists at the specified path. If it doesn’t, log an error message to help with debugging. This can prevent the FileNotFoundError and give us a clearer indication of the problem.

Handle Character Encoding

If the issue is related to character encoding, we need to ensure that the system is handling Unicode characters correctly. This involves:

  • UTF-8 encoding: Ensure that all parts of the system (including the database, file system, and RAGFlow code) are using UTF-8 encoding.
  • Filename encoding: When storing and retrieving filenames, ensure that they are properly encoded and decoded to handle Unicode characters. Using consistent encoding throughout the system is key.
  • Normalization: Consider normalizing Unicode filenames to a consistent form to avoid issues with different representations of the same character. This can help prevent subtle differences from causing problems.

Resolution Steps

  1. Redis Verification: I would first suggest verifying the Redis configuration. Ensure that the username and password are correct and that the Redis server is running and accessible from the RAGFlow environment.
  2. MinIO Investigation: Next, I'd suggest investigating MinIO. Check the MinIO logs for errors related to file uploads or storage. Verify the bucket configuration and permissions.
  3. File Path Debugging: If the above steps don't resolve the issue, debugging the file path resolution is crucial. Adding logging statements to print the file path during parsing can help identify if the path is being constructed correctly.
  4. Encoding Handling: If the issue persists, handling character encoding should be examined. Ensuring that all parts of the system use UTF-8 encoding and that filenames are properly encoded and decoded can resolve encoding-related problems.

Conclusion

Alright guys, that’s a wrap on this FileNotFoundError bug report. We've covered a lot of ground, from Redis connection issues to file storage in MinIO and potential character encoding problems. By systematically checking each of these areas, we should be able to nail down the root cause and get things running smoothly again. Remember, debugging is like detective work – each clue leads us closer to the solution. Let's get those files parsing!