on_chain_error() — langchain Function Reference

Architecture documentation for the on_chain_error() function in base.py from the langchain codebase.

Function python Observability Tracers calls 3 called by 1

Entity Profile

Observability→ Tracers→ on_chain_error() — langchain Function Reference

Dependency Diagram

graph TD
  6071fd13_110e_a9c7_7fe7_393fad76004d["on_chain_error()"]
  0f6b3261_31fa_c34e_ca33_cb141bdf78ff["BaseTracer"]
  6071fd13_110e_a9c7_7fe7_393fad76004d -->|defined in| 0f6b3261_31fa_c34e_ca33_cb141bdf78ff
  72140908_8740_79fb_ea23_239b2c6ed1e4["on_chain_error()"]
  72140908_8740_79fb_ea23_239b2c6ed1e4 -->|calls| 6071fd13_110e_a9c7_7fe7_393fad76004d
  9191b24f_a202_df21_16c5_e2608083aef8["_end_trace()"]
  6071fd13_110e_a9c7_7fe7_393fad76004d -->|calls| 9191b24f_a202_df21_16c5_e2608083aef8
  98f0a033_64cf_a17e_a844_59b5893be0a4["_on_chain_error()"]
  6071fd13_110e_a9c7_7fe7_393fad76004d -->|calls| 98f0a033_64cf_a17e_a844_59b5893be0a4
  72140908_8740_79fb_ea23_239b2c6ed1e4["on_chain_error()"]
  6071fd13_110e_a9c7_7fe7_393fad76004d -->|calls| 72140908_8740_79fb_ea23_239b2c6ed1e4
  style 6071fd13_110e_a9c7_7fe7_393fad76004d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/base.py lines 315–341

    def on_chain_error(
        self,
        error: BaseException,
        *,
        inputs: dict[str, Any] | None = None,
        run_id: UUID,
        **kwargs: Any,
    ) -> Run:
        """Handle an error for a chain run.

        Args:
            error: The error.
            inputs: The inputs for the chain.
            run_id: The run ID.
            **kwargs: Additional arguments.

        Returns:
            The run.
        """
        chain_run = self._errored_chain_run(
            error=error,
            run_id=run_id,
            inputs=inputs,
        )
        self._end_trace(chain_run)
        self._on_chain_error(chain_run)
        return chain_run