🐛 Bug Report: Langchain ChromaDB RAG template does not seem to work

[slice4e]

Which component is this bug for?

Langchain Instrumentation

📜 Description

The ChromaDB instrumentation worked for me when using the provided sample app. However, when using a Langchain RAG implementation with ChromaDB, here: https://github.com/langchain-ai/langchain/tree/master/templates/rag-chroma
I did not work for me.

👟 Reproduction steps

Download the Langchain ChromaDB RAG template: https://github.com/langchain-ai/langchain/tree/master/templates/rag-chroma
Modify chain.py to enable Traceloop. (import and Traceloop.init).

👍 Expected behavior

Expected to see the spans in the web GUI

👎 Actual Behavior with Screenshots

Did not see the spans.

🤖 Python Version

3.11

📃 Provide any additional context for the Bug.

No response

👀 Have you spent some time to check if this bug has been raised before?

• I checked and didn't find similar issue

Are you willing to submit PR?

None

[nirga]

This should work, see this example. Because LangServe uses uvicorn you need to initialize Traceloop in the same file as the chain itself, and not in the server.py file - as they "live" in separate python contexts