{"record":{"id":"eefef4e418423f53","repo":"Hmbown/CodeWhale","slug":"another-codewhale-process-owns-delegated-coordin","errorCode":null,"errorMessage":"another Codewhale process{} owns delegated coordination for {}: {error}","messagePattern":"another Codewhale process(.+?) owns delegated coordination for (.+?): (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/tui/src/tools/subagent/mod.rs","lineNumber":3461,"sourceCode":"            }\n        });\n        match ready_rx.recv_timeout(Duration::from_secs(5)) {\n            Ok(Ok(())) => Ok(Self {\n                release: Some(release_tx),\n                thread: Some(thread),\n            }),\n            Ok(Err(error)) => {\n                let _ = thread.join();\n                let holder_pid = std::fs::read_to_string(&lock_path)\n                    .ok()\n                    .and_then(|contents| contents.trim().parse::<u32>().ok());\n                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    }","sourceCodeStart":3443,"sourceCodeEnd":3479,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/73e0f67d83c59909b571efdfc88c4bc28c309cb1/crates/tui/src/tools/subagent/mod.rs#L3443-L3479","documentation":"Delegated sub-agent coordination state is guarded by a cross-process lock file under state_root. When lock acquisition fails and the holder PID recorded in the lock file is a different process, this error reports which process (by PID) owns the coordination, so the caller knows the operation cannot proceed until that process exits or releases.","triggerScenarios":"Starting a delegated sub-agent operation whose state_root coordination lock file records a holder PID different from std::process::id(), while the lock acquisition attempt returned Err(error) (timeout or refusal).","commonSituations":"Two Codewhale instances (or a TUI and a CLI) sharing a workspace state_root; a crashed predecessor left a valid lock file; parallel agent runs in separate terminals on the same project.","solutions":["Identify and stop the other Codewhale process listed in the message (kill <pid>) or wait for it to finish.","Use a different state_root / workspace so the two processes do not contend for the same delegated coordination.","If the PID no longer exists (crashed holder), verify with ps -p <pid> and remove the stale lock file.","Retry the operation once the other process has released coordination."],"exampleFix":"// before: blind retry against a held lock\nlet result = spawn_delegated(state_root);\n// after: check holder before attempting\nlet holder = std::fs::read_to_string(state_root.join(\"coordination.lock\")).ok();\nif holder_is_live_other_process(&holder) { return Err(/* surface holder pid, don't retry */); }\nlet result = spawn_delegated(state_root);","handlingStrategy":"retry","validationCode":"fn other_process_holds(state_root: &Path) -> Option<u32> {\n    std::fs::read_to_string(state_root.join(\"coordination.lock\")).ok()\n        .and_then(|c| c.trim().parse::<u32>().ok())\n        .filter(|pid| *pid != std::process::id())\n}","typeGuard":"fn holder_is_external(state_root: &Path) -> bool {\n    other_process_holds(state_root).is_some()\n}","tryCatchPattern":"match acquire_delegated_coordination(state_root) {\n    Err(e) if e.to_string().contains(\"another Codewhale process\") => {\n        eprintln!(\"coordination held elsewhere; retry after it exits\");\n        backoff_retry(state_root, 3);\n    }\n    r => r?,\n}","preventionTips":["Give each concurrent Codewhale instance its own state_root/workspace.","Check the lock holder PID before long-running delegated operations.","Clean up lock files after abnormal exits once you confirm the PID is dead."],"tags":["concurrency","locking","multi-process"],"backgroundTag":"coordination-lock-held-by-other-process","analyzedSha":"73e0f67d83c59909b571efdfc88c4bc28c309cb1","analyzedAt":"2026-09-22T01:30:00.501Z","contentChangedAt":"2026-09-22T01:30:00.501Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}