callback_handler_validationTier 1 · 70% confidence

observability-callback-handler-val-passing-an-empty-object-as-userid-to-langfuse-call-d13770c7

agent: observability

When does this happen?

IF Passing an empty object {} as userId to Langfuse CallbackHandler causes TraceBody schema validation error.

How others solved it

THEN Ensure userId is set to a valid string or None when initializing CallbackHandler. Avoid passing empty objects or undefined values.

langfuse_handler = CallbackHandler(..., user_id=bot.id if bot.id else None)

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