Hmbown/CodeWhale · error

Compaction lifecycle task ended before acknowledgement

Error message

Compaction lifecycle task ended before acknowledgement

What it means

Sentinel from acceptance_rx.await.map_err in trigger_compaction: the spawned compaction lifecycle task (permit claim + Op::CompactContext send + spawn_claimed_turn_monitor) exited before writing its acknowledgement to the channel. Receiver-side failure means the producer task died — panic, abort, or shutdown — so the compaction was never dispatched to the engine.

Source

Thrown at crates/tui/src/runtime_threads.rs:6487

                current_thread.allow_shell,
                current_thread.trust_mode,
                policy.auto_approve(),
                policy.permission,
                configured_sandbox_mode,
            );
            let _sender = permit.send(op);
            touch_lru(&mut active.lru, thread_id);
            self.spawn_claimed_turn_monitor(
                turn.clone(),
                None,
                engine.clone(),
                ClaimedTurnKind::Compaction,
            )
        };

        acceptance_rx
            .await
            .map_err(|_| anyhow!("Compaction lifecycle task ended before acknowledgement"))?
            .map_err(anyhow::Error::msg)
    }

    #[cfg(test)]
    pub fn events_since(
        &self,
        thread_id: &str,
        since_seq: Option<u64>,
    ) -> Result<Vec<RuntimeEventRecord>> {
        self.store.events_since(thread_id, since_seq)
    }

    pub(crate) async fn events_since_async(
        &self,
        thread_id: &str,
        since_seq: Option<u64>,
    ) -> Result<Vec<RuntimeEventRecord>> {
        let store = self.store.clone();

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Look for a panic or early return in the compaction dispatch closure in the logs
2. Confirm the engine op channel is open and the permit machinery is healthy
3. Re-trigger the compaction after the root cause is fixed; the unacknowledged turn should have been cleaned up

When it happens

Trigger: Thrown at crates/tui/src/runtime_threads.rs:6487 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/ea3e6c8ee3aca6dd. Report an issue: GitHub.