nautechsystems/nautilus_trader · error

Failed to terminate Binance Spot session tasks: {e}

Error message

Failed to terminate Binance Spot session tasks: {e}

What it means

Teardown failure in await_session_tasks: terminating the Binance Spot session task group timed out or failed during connect error handling; the original failure is augmented with this termination error.

Source

Thrown at crates/adapters/binance/src/spot/execution.rs:608

    fn abort_pending_tasks(&self) {
        crate::common::execution::abort_pending_tasks(&self.pending_tasks);
    }

    fn abort_session_tasks(&self) {
        self.session_tasks.begin_shutdown();
    }

    async fn await_pending_tasks(&self) -> anyhow::Result<()> {
        crate::common::execution::await_pending_tasks(&self.pending_tasks).await
    }

    async fn await_session_tasks(&self) -> anyhow::Result<()> {
        self.session_tasks.begin_shutdown();
        self.session_tasks
            .finish_shutdown(Duration::from_secs(1), Duration::from_secs(2))
            .await
            .map_err(|e| anyhow::anyhow!("Failed to terminate Binance Spot session tasks: {e}"))?;
        Ok(())
    }

    async fn ws_setup_failure(
        &mut self,
        mut ws_trading: BinanceSpotWsTradingClient,
        reason: String,
    ) -> anyhow::Error {
        ws_trading.mark_user_data_inactive();
        log::error!("{reason}; Binance Spot private user data is required for execution");

        self.abort_session_tasks();

        if let Err(e) = ws_trading.disconnect().await {
            log::warn!("Failed to stop Binance Spot trading WebSocket after setup failure: {e}");
        }
        self.disconnect_us_user_data().await;

View on GitHub (pinned to 18893faf8b)

Solutions

1. Inspect the underlying task-group shutdown error
2. Ensure no session tasks are deadlocked (check WS client state) and retry connect

When it happens

Trigger: Thrown at crates/adapters/binance/src/spot/execution.rs:608 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/6a1e59ae29ed69e5. Report an issue: GitHub.