nautechsystems/nautilus_trader · error

Failed to stop trader components: {stop_err}; failed to comp

Error message

Failed to stop trader components: {stop_err}; failed to complete trader stop: {transition_err}

What it means

Composite failure in stop_after_start_failure: stopping the trader's components failed and the final trader stop transition also failed; all components still receive a stop attempt, but both errors are surfaced.

Source

Thrown at crates/system/src/trader.rs:1121

    /// Stops a partially started trader without deferring managed strategy shutdown.
    ///
    /// # Errors
    ///
    /// Returns an error if the trader transition or any component stop fails. All registered
    /// components still receive a stop attempt before the error is returned.
    pub fn stop_after_start_failure(&mut self) -> anyhow::Result<()> {
        self.transition_state(ComponentTrigger::Stop)?;

        let stop_result = self.stop_components_after_start_failure();
        let clock = self.clock_factory.clock();
        self.ts_stopped = Some(clock.borrow().timestamp_ns());
        let transition_result = self.transition_state(ComponentTrigger::StopCompleted);

        match (stop_result, transition_result) {
            (Ok(()), Ok(())) => Ok(()),
            (Err(stop_err), Ok(())) => Err(stop_err),
            (Ok(()), Err(transition_err)) => Err(transition_err),
            (Err(stop_err), Err(transition_err)) => anyhow::bail!(
                "Failed to stop trader components: {stop_err}; failed to complete trader stop: \
                 {transition_err}"
            ),
        }
    }

    fn stop_components_after_start_failure(&mut self) -> anyhow::Result<()> {
        let mut errors = Vec::new();

        for actor_id in &self.actor_ids {
            log::debug!("Stopping actor {actor_id} after startup failure");
            if let Err(e) = Self::stop_component_if_active(actor_id.inner()) {
                errors.push(format!("actor {actor_id}: {e:#}"));
            }
        }

        for exec_algorithm_id in self.exec_algorithm_ids.clone() {
            log::debug!("Stopping execution algorithm {exec_algorithm_id} after startup failure");

View on GitHub (pinned to 18893faf8b)

Solutions

1. Inspect the component stop errors and the transition error independently
2. Force-dispose components manually if the stop transition failed

When it happens

Trigger: Thrown at crates/system/src/trader.rs:1121 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/168b7877a0a4debf. Report an issue: GitHub.