上传文件后对话正常，返回知识库时报错:Bad message format Tried to use SessionInfo before it was initialized about langchain-chatchat

[dosubot]

The errors you're encountering, "Bad message format Tried to use SessionInfo before it was initialized" and WebSocketClosedError, suggest issues with session state management and WebSocket connections, respectively.

For the "Bad message format" error, it's crucial to ensure all session state variables in your Streamlit app are initialized before they're accessed. This can be done by checking if a session state variable exists and setting a default value if it doesn't:

if 'selected_kb_name' not in st.session_state:
    st.session_state['selected_kb_name'] = None  # or a default value
if 'selected_kb_info' not in st.session_state:
    st.session_state['selected_kb_info'] = ""

Make sure to update these session state variables appropriately based on user interactions or other events in your application.

Regarding the WebSocketClosedError, this error occurs when there's an attempt to send or receive data over a WebSocket connection that has been closed. This could be due to network issues, client disconnects, or server-side problems. Since the error is related to WebSocket connections, which are managed by your server framework (like Uvicorn with FastAPI), you might not have direct control over this unless you're explicitly handling WebSocket connections in your code. If your application does use WebSockets, ensure you have proper error handling for closed connections.

If these errors persist, adding detailed logging around session state updates and WebSocket communication can help identify the exact points of failure.

Details

Sources

• 无法使用知识库问答和知识库测试，报error
• [BUG] 上传知识库文件报错
• webui_pages/knowledge_base/knowledge_base.py
• server/api.py
• server/chat/file_chat.py
• knowledge_base/samples/content/test_files/langchain-ChatGLM_closed.jsonl
• configs/basic_config.py.example
• knowledge_base/samples/content/test_files/langchain-ChatGLM_open.jsonl
• webui_pages/dialogue/dialogue.py

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