Neo4j Connection Refused in Docker Compose Setup with LangChain Integration

bake_betty

I'm working on a project using LangChain to connect to a Neo4j database hosted in a Docker container. I've set up the environment using docker-compose, but I'm encountering a Connection Refused error when attempting to interact with Neo4j through the Neo4jVector integration from LangChain. My python worked properly when I used neo4j API and use cloud instance. But when I shifted to docker for neo4j. After than I am facing this error. I tested...

Originally asked by Binit Sapkota on Stack Exchange (stackoverflow) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

I had a similar issue and was able to resolve it by checking the network configuration in Docker-Compose. Make sure Neo4j is running in the correct network and accessible from other containers. A useful approach is to set NEO4J_URI as bolt://neo4j:7687 if “neo4j” is the service name in your docker-compose.yml. Also, checking the container logs (docker logs ) can provide more insights into potential errors. I documented a similar case here: https://ollama.com/IBLAG/Certification

Full answer by Markus 81: https://stackoverflow.stackexchange.com/a/79431273 (CC BY-SA 4.0).

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