Anyone getting this error while using

At a glance

A community member is encountering a validation error while using the BM25 Retriever, specifically "Can't instantiate abstract class BaseNode with abstract methods get_content, get_metadata_str, get_type, hash, set_content (type=type_error)". The community members have tried upgrading the llamaindex and BM25 versions, but the issue persists. They have also checked for any mixing of legacy imports with non-legacy imports. The issue seems to be specific to the community member's environment, as the code works fine for others in a fresh environment and on Google Colab. The community members have tried deploying the code on Streamlit Community Cloud, but the issue remains. There is no explicitly marked answer in the comments.

kkush2861

Anyone getting this error while using BM25 Retriever?

Plain Text

ValidationError: 1 validation error for NodeWithScore node Can't instantiate abstract class BaseNode with abstract methods get_content, get_metadata_str, get_type, hash, set_content (type=type_error)

18 comments

WWhiteFang_Jr

Are you trying with latest version fro BM25 and llamaindex?

kkush2861

yes

kkush2861

only encountered after upgrading llamaindex version

WWhiteFang_Jr

Can you try upgrading BM25 as well?

kkush2861

Did that too.

LLogan M

Seems like you are mixing legacy imports with non-legacy imports

kkush2861

I checked that too

kkush2861

Plain Text

import streamlit as st
from llama_index.llms.openai import OpenAI
from llama_index.retrievers.bm25 import BM25Retriever
from llama_index.core.retrievers import VectorIndexRetriever
from llama_index.core.retrievers import BaseRetriever
from llama_index.core.chat_engine import CondensePlusContextChatEngine
from llama_index.core.query_engine import RetrieverQueryEngine
from llama_index.core.postprocessor import LongContextReorder 
from llama_index.core.base.llms.types import ChatMessage, MessageRole
from llama_index.embeddings.openai import OpenAIEmbedding
import openai
import os

these are my imports

kkush2861

@Logan M

kkush2861

One detail I missed. I am running this on ec2

LLogan M

Hmm I've never had that issue. Maybe start with a fresh venv?

kkush2861

Okay

kkush2861

Not working even with a fresh venv?

kkush2861