tracing_errorTier 1 · 70% confidence
observability-tracing-error-using-a-retriever-tool-in-a-langgraph-agent-via-la-75e70081
agent: observability
When does this happen?
IF Using a retriever tool in a LangGraph agent (via LangServe or standalone), the LangChainTracer.on_tool_end callback throws TracerException: 'Found chain run at ID ... but expected {'tool'} run.'
How others solved it
THEN Upgrade the langsmith package to version 0.1.88 or later. The bug is fixed in that release. Run: pip install --upgrade langsmith>=0.1.88
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