{"record":{"id":"ba07c6671a1e017f","repo":"Hmbown/CodeWhale","slug":"coordination-lock-timeout-marker-for-error","errorCode":null,"errorMessage":"{COORDINATION_LOCK_TIMEOUT_MARKER} for {}: {error}","messagePattern":"\\{COORDINATION_LOCK_TIMEOUT_MARKER\\} for \\{\\}: \\{error\\}","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/tui/src/tools/subagent/mod.rs","lineNumber":3278,"sourceCode":"                if holder_pid == Some(std::process::id()) {\n                    Err(anyhow!(\n                        \"{COORDINATION_SAME_PROCESS_HANDOVER} for {}: {error}\",\n                        state_root.display()\n                    ))\n                } else {\n                    Err(anyhow!(\n                        \"another Codewhale process{} owns delegated coordination for {}: {error}\",\n                        holder_pid\n                            .map(|pid| format!(\" (pid {pid})\"))\n                            .unwrap_or_default(),\n                        state_root.display()\n                    ))\n                }\n            }\n            Err(error) => {\n                drop(release_tx);\n                let _ = thread.join();\n                Err(anyhow!(\n                    \"{COORDINATION_LOCK_TIMEOUT_MARKER} for {}: {error}\",\n                    state_root.display()\n                ))\n            }\n        }\n    }\n}\n\nimpl Drop for CoordinationProcessLock {\n    fn drop(&mut self) {\n        self.release.take();\n        if let Some(thread) = self.thread.take() {\n            let _ = thread.join();\n        }\n    }\n}\n\npub struct SubAgentManager {","sourceCodeStart":3260,"sourceCodeEnd":3296,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/433685b2024e7bc4c99e1e2e326bcad39b4d9d65/crates/tui/src/tools/subagent/mod.rs#L3260-L3296","documentation":"Acquiring delegated coordination runs in a helper thread with a timeout; the requester waits on a release channel. If the wait itself errors (e.g. the channel drops or the wait future fails before the lock is acquired), the thread is joined and this COORDINATION_LOCK_TIMEOUT_MARKER error is returned with the state root and underlying error.","triggerScenarios":"The oneshot/signal wait for coordination-lock acquisition fails (sender dropped without sending, or wait error) while trying to take the coordination lock for state_root.","commonSituations":"The lock-acquisition thread panicked or exited early, dropping release_tx; a timeout racing a lock that never becomes free; scheduling starvation of the helper thread.","solutions":["Check the wrapped {error} — typically the acquisition thread died or timed out; fix that panic/timeout first","Retry the coordination acquisition after a short delay","Inspect the helper thread for panics (unwrap on lock/file ops) and make it propagate errors instead","If another process holds the lock long-term, wait for it to exit rather than retrying immediately"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"match coordination_wait_rx.await {\n    Ok(Ok(guard)) => guard,\n    Ok(Err(e)) | Err(_) => {\n        // sender dropped or wait failed: back off and retry acquisition once\n        tokio::time::sleep(Duration::from_millis(200)).await;\n        return retry_coordination_acquire(state_root);\n    }\n}","preventionTips":["Make the acquisition thread propagate errors instead of panicking/dropping the channel","Keep helper-thread lifetimes tied to the request so release_tx cannot drop early","Use bounded retries with backoff for lock acquisition","Log thread panics with a panic hook so failures are diagnosable"],"tags":["coordination","timeout","locking"],"backgroundTag":"request-timeout","analyzedSha":"433685b2024e7bc4c99e1e2e326bcad39b4d9d65","analyzedAt":"2026-09-15T12:24:24.634Z","contentChangedAt":"2026-09-15T12:24:24.634Z","schemaVersion":2},"datasetVersion":"2026-09-22T01:17:13.364Z"}