Hey folks, do we have some restrictions
Hey folks, do we have some restrictions on what kind of input/outputs a "chain" can have in LangChain while integrating with Langfuse?
I was trying Langfuse, but got an error
where,
I have two chains KBSearch which outputs a dict {"articles": list[SearchResponse], "qa": list[SearchResponse]}
and that output is "piped" (in LangChain's LCEL terms) to the AnswerChain
I did get some part of trace in between, sharing link: https://cloud.langfuse.com/project/clr8y6gcu0000ckbq48ve60bz/traces/b3147d4f-89fc-4bb6-85f7-dc5329db6f8f?observation=b7a13e12-105a-42e3-b90e-7c175d2c0cf9
Could you let me know if these errors are right now expected, or do you think this is a bug?
8 Replies
bumping this..!
@Marc bumping this one more time in case you can give some clue on this?
Just wanted to know if it's a known bug/expected feature, or I am using it somehow wrong
Interesting error, thanks for sharing
GitHub
bug: JSON serializability issues · Issue #948 · langfuse/langfuse
Describe the bug Langfuse fails to serialize some of the runs with error: Exception in adding task Object of type <X> is not JSON serializable where X = a custom type. To reproduce @dataclass...
This is your issue right?
Will try to look into this soon to fix/debug
hey yeah, this is my issue only.. Thanks for taking out the time to look into it!
Hey @Marc , any luck here?
https://github.com/langfuse/langfuse-python/pull/357
Have raised a PR with a potential fix. PTAL when you get some time! Thanks!
GitHub
fix: support more types for JSON serialization by SinghCoder · Pull...
Fixes langfuse/langfuse#948
For my case, it was a dataclass which I was returning as a chain output, and python default JSON serializer does not support dataclasses dumping.. See StackOverflow Thre...
thanks a lot!
@Max just merged it
this was on the list to fix this week, you were faster 🙂