Question about setting LANGCHAIN_HANDLER environment variable

[xuanxuanQAQ]

Hello, I came across a code snippet in the tutorial page on "Conversation Agent (for Chat Models)" that has left me a bit confused. The tutorial also mentioned a warning error like this: WARNING:root:Failed to default session, using empty session: HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /sessions (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x10a1767c0>: Failed to establish a new connection: [Errno 61] Connection refused')) Then i found the line of code in question is: os.environ["LANGCHAIN_HANDLER"] = "langchain" When I remove this line from the code, the program still seems to work without any errors. So why is this line of code exists. Thank you!

[arminta7]

I was wondering the same thing.

[matthew-walters]

It appears to be for tracing

[xuanxuanQAQ]

I see, thank you.

[walt798]

i have same issue please tell me where i can find and remove this line?