Nothing is logged to Langfuse

[bilgeyucel]

Describe the bug
I see the trace is saved but I dont see the details of my pipeline in Langfuse. Everything seems null

Langfuse trace for further debugging: https://us.cloud.langfuse.com/project/clx4rzcjx00091n5vppw1l8rh/traces/f9a6f5c0-55cd-472e-92f3-10bec49ad025?observation=27cbc891-f9d0-4f8c-96df-2f7d4d30edd8

To Reproduce
Colab notebook: https://colab.research.google.com/drive/1j6H88t8WaMNhA4y0qWCS1wqZhBW3TEFU?usp=sharing

Describe your environment (please complete the following information):

• OS: Google Colab
• Haystack version: 2.2.0
• Integration version: langfuse_haystack-0.0.4

[mrm1001]

Managed to reproduce issue in local notebook.

[Redna]

seems to be the same as in #789 then environment vars needs to be set before the actual import of LangfuseConnector.

from datasets import load_dataset
from haystack import Document, Pipeline
from haystack.components.builders import PromptBuilder
from haystack.components.embedders import OpenAIDocumentEmbedder, OpenAITextEmbedder
from haystack.components.generators import OpenAIGenerator
from haystack.components.retrievers import InMemoryEmbeddingRetriever
from haystack.document_stores.in_memory import InMemoryDocumentStore
from haystack_integrations.components.connectors.langfuse import LangfuseConnector
import os
from google.colab import userdata

os.environ["OPENAI_API_KEY"] = userdata.get('OPENAI_API_KEY')
os.environ["TOKENIZERS_PARALLELISM"] = "false"
os.environ["HAYSTACK_CONTENT_TRACING_ENABLED"]="True"
os.environ["LANGFUSE_SECRET_KEY"]=userdata.get('LANGFUSE_SECRET_KEY')
os.environ["LANGFUSE_PUBLIC_KEY"]=userdata.get('LANGFUSE_PUBLIC_KEY')
os.environ["LANGFUSE_HOST"]="https://us.cloud.langfuse.com"

needs to be changed to

from datasets import load_dataset
from haystack import Document, Pipeline
from haystack.components.builders import PromptBuilder

import os
os.environ["OPENAI_API_KEY"] = userdata.get('OPENAI_API_KEY')
os.environ["TOKENIZERS_PARALLELISM"] = "false"
os.environ["HAYSTACK_CONTENT_TRACING_ENABLED"]="True"
os.environ["LANGFUSE_SECRET_KEY"]=userdata.get('LANGFUSE_SECRET_KEY')
os.environ["LANGFUSE_PUBLIC_KEY"]=userdata.get('LANGFUSE_PUBLIC_KEY')
os.environ["LANGFUSE_HOST"]="https://us.cloud.langfuse.com"

from haystack.components.embedders import OpenAIDocumentEmbedder, OpenAITextEmbedder
from haystack.components.generators import OpenAIGenerator
from haystack.components.retrievers import InMemoryEmbeddingRetriever
from haystack.document_stores.in_memory import InMemoryDocumentStore
from haystack_integrations.components.connectors.langfuse import LangfuseConnector

from google.colab import userdata

[masci]

Thanks @Redna, that's the problem indeed. I filed a change to the docs to stress that the environment variable must be set before importing the tracer, we can close.