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[KANDEV-W-092] Agentctl permission notification stall investigation #65

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opened 2026-10-10 23:19:40 +09:00 by dreampiler · 3 comments
dreampiler commented 2026-10-10 23:19:40 +09:00
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소유자 목표: 운영 세션 → Kandev 관제(2026-10-10)의 요청 「앞서 요청한 에이전트 전체 정지 결함에 단서 추가」, 「추정으로 고치지 않는다」.
확인할 결과: 전체 에이전트 정지의 실제 agentctl 대기 경로와 전역 전파 원인이 코드·실행 근거로 판정되고, 확인한 사실과 가설 및 부족한 덤프를 구분한 원인 보고가 나온다.
queue: KANDEV-W-092

This task owns one bounded investigation into the repeatedly reported instance-wide agent stall. Do not implement a speculative fix. The original requested defect is not found among five current Kandev workflow lists or canonical p320 duplicate search; closed W032 is MCP roots initialization and completed W028b is standalone timeout, neither proves the same cause. Report overlap if actual causal evidence shows one.

Operations-provided evidence, not your independent observations:

  • Backend goroutine snapshots kandev-stop-wait-23938267 (21:46 KST) and kandev-stop-wait-1025946687 (22:44 KST) show Client.readUpdatesStream at agent.go:598 and Launcher.pipeOutput at launcher_output.go:27 waiting for agentctl data. Backend is not established to have stopped consuming.
  • Agentctl-origin logs stop after21:42:05 and22:41:39 KST until restart. Observed agentctl CPU0.03core suggests waiting, not proof of cause or lock ownership.
  • Both final log sequences are received permission request -> handling -> auto-approving permission request -> sending permission notification via updates channel, timestamps21:42:05.235 and22:41:39.059. Expected received permission response/resolved permission request is absent.
  • Starting source pointers (operation-observed line numbers, refresh against assigned revision): apps/backend/internal/agentctl/server/process/manager.go sendPermissionNotification around3656 -> persistDeliveryEvent -> IsAttached -> sendUpdateBlocking in blocking_send.go:19. Operations suspects standalone DurableJournalPath is empty; verify. Detached send may wait indefinitely until stop; attached path reportedly has5s timer, with no failure log seen.
  • Hypothesis only: permission notification blocks in a detached instance while holding a shared lock/channel, causing process-wide stall. Establish the exact ownership, call stack and cross-instance propagation; do not label this confirmed simply because all logs stop.

Required work:

  1. In your assigned worktree, read relevant repository/scoped AGENTS and debug/fix/context skills as applicable. Trace attachment state transitions, standalone journal initialization and the complete permission handling call chain, mutex/channel ownership and release/cancellation. Use exact files/lines and current commit. Distinguish per-instance waiting from process-wide serialization.
  2. Read latest upstream kdlbs/kandev history/code for the same path and compare with the approved fork revision, read-only. No upstream PR/issues/comments/push. Any future upstream communication belongs solely to fixed Opus owner W0916f198197-cd2e-40d5-af27-fefd1d5813c6.
  3. Existing opt-in diagnostic listener: apps/backend/cmd/agentctl/pprof_listener.go, KANDEV_AGENTCTL_PPROF_ADDR, loopback only. Operations already requested AIWS restart/swap integration and pre-restart capture of /debug/pprof/goroutine?debug=2 into existing logs. Do not duplicate that task, add monitoring infrastructure, or change operating env/ports/daemon/DB/processes. Ask parent for the existing agentctl dump path when needed; absent dump stays explicitly unconfirmed.
  4. Report confirmed code facts, competing hypotheses, affected scope, missing evidence and the minimal evidence-based fix proposal. If a code path is provably causal in an isolated reproduction, record exact input/output and why it explains whole-process impact. No new permanent integration/e2e tests, CI/collection change, full suite or broad audit. Do not claim runtime recovery from a static review.
  5. If the agentctl dump or another original input is required to choose a fix, ask_parent_question_kandev with exact needed evidence and continue independent code/history comparison. Do not repeatedly wait/poll, move yourself to Hold or request owner permission for operations-owned diagnostics. Finish a bounded investigation turn with preserved results; no production/permanent test edits until cause is confirmed and the fix scope is addressed through the existing workflow.

Execution: parent standing controller, explicit Worktree08eb0bba-37dc-459c-b34c-14322417bde7, repository068d4436-d120-42af-b178-8e1a45eb2279, forkmain, new_workspace. Use assigned worktree only; no shared checkout Git/file writes or second worktree.
Design pointers: design-card invariant5(worktree isolation), 설계카드.md:32; design index 설계색인.md:18(Agent Manager)/:39-40(Executors And Runtime), and fork docs/ARCHITECTURE.md section4 Agent Manager Service. Read exact relevant source only. Root cause/code investigation is delegated here; controller does no direct repository investigation.
Prohibitions: operating Kandev38430/~.kandev/C:\AIWS\Kandev/DB/process modification or restart; terminate only processes you explicitly start in an isolated approved reproduction; no paid provider calls, credential changes, new diagnostics framework, upstream write, speculative implementation or duplicate diagnostic task.
Reporting: preserve owner goal, code facts vs operations report vs hypothesis. Include current task commit and relevant references, no secret values/internal paths in any later public artifact. Use existing report-progress for this queue when a stage result is actually ready; no fabricated PR, empty commit or blanket production PASS.

소유자 목표: 운영 세션 → Kandev 관제(2026-10-10)의 요청 「앞서 요청한 에이전트 전체 정지 결함에 단서 추가」, 「추정으로 고치지 않는다」. 확인할 결과: 전체 에이전트 정지의 실제 agentctl 대기 경로와 전역 전파 원인이 코드·실행 근거로 판정되고, 확인한 사실과 가설 및 부족한 덤프를 구분한 원인 보고가 나온다. queue: KANDEV-W-092 This task owns one bounded investigation into the repeatedly reported instance-wide agent stall. Do not implement a speculative fix. The original requested defect is not found among five current Kandev workflow lists or canonical p320 duplicate search; closed W032 is MCP roots initialization and completed W028b is standalone timeout, neither proves the same cause. Report overlap if actual causal evidence shows one. Operations-provided evidence, not your independent observations: - Backend goroutine snapshots kandev-stop-wait-23938267 (21:46 KST) and kandev-stop-wait-1025946687 (22:44 KST) show Client.readUpdatesStream at agent.go:598 and Launcher.pipeOutput at launcher_output.go:27 waiting for agentctl data. Backend is not established to have stopped consuming. - Agentctl-origin logs stop after21:42:05 and22:41:39 KST until restart. Observed agentctl CPU0.03core suggests waiting, not proof of cause or lock ownership. - Both final log sequences are received permission request -> handling -> auto-approving permission request -> sending permission notification via updates channel, timestamps21:42:05.235 and22:41:39.059. Expected received permission response/resolved permission request is absent. - Starting source pointers (operation-observed line numbers, refresh against assigned revision): apps/backend/internal/agentctl/server/process/manager.go sendPermissionNotification around3656 -> persistDeliveryEvent -> IsAttached -> sendUpdateBlocking in blocking_send.go:19. Operations suspects standalone DurableJournalPath is empty; verify. Detached send may wait indefinitely until stop; attached path reportedly has5s timer, with no failure log seen. - Hypothesis only: permission notification blocks in a detached instance while holding a shared lock/channel, causing process-wide stall. Establish the exact ownership, call stack and cross-instance propagation; do not label this confirmed simply because all logs stop. Required work: 1. In your assigned worktree, read relevant repository/scoped AGENTS and debug/fix/context skills as applicable. Trace attachment state transitions, standalone journal initialization and the complete permission handling call chain, mutex/channel ownership and release/cancellation. Use exact files/lines and current commit. Distinguish per-instance waiting from process-wide serialization. 2. Read latest upstream kdlbs/kandev history/code for the same path and compare with the approved fork revision, read-only. No upstream PR/issues/comments/push. Any future upstream communication belongs solely to fixed Opus owner W0916f198197-cd2e-40d5-af27-fefd1d5813c6. 3. Existing opt-in diagnostic listener: apps/backend/cmd/agentctl/pprof_listener.go, KANDEV_AGENTCTL_PPROF_ADDR, loopback only. Operations already requested AIWS restart/swap integration and pre-restart capture of /debug/pprof/goroutine?debug=2 into existing logs. Do not duplicate that task, add monitoring infrastructure, or change operating env/ports/daemon/DB/processes. Ask parent for the existing agentctl dump path when needed; absent dump stays explicitly unconfirmed. 4. Report confirmed code facts, competing hypotheses, affected scope, missing evidence and the minimal evidence-based fix proposal. If a code path is provably causal in an isolated reproduction, record exact input/output and why it explains whole-process impact. No new permanent integration/e2e tests, CI/collection change, full suite or broad audit. Do not claim runtime recovery from a static review. 5. If the agentctl dump or another original input is required to choose a fix, ask_parent_question_kandev with exact needed evidence and continue independent code/history comparison. Do not repeatedly wait/poll, move yourself to Hold or request owner permission for operations-owned diagnostics. Finish a bounded investigation turn with preserved results; no production/permanent test edits until cause is confirmed and the fix scope is addressed through the existing workflow. Execution: parent standing controller, explicit Worktree08eb0bba-37dc-459c-b34c-14322417bde7, repository068d4436-d120-42af-b178-8e1a45eb2279, forkmain, new_workspace. Use assigned worktree only; no shared checkout Git/file writes or second worktree. Design pointers: design-card invariant5(worktree isolation), 설계카드.md:32; design index 설계색인.md:18(Agent Manager)/:39-40(Executors And Runtime), and fork docs/ARCHITECTURE.md section4 Agent Manager Service. Read exact relevant source only. Root cause/code investigation is delegated here; controller does no direct repository investigation. Prohibitions: operating Kandev38430/~.kandev/C:\AIWS\Kandev/DB/process modification or restart; terminate only processes you explicitly start in an isolated approved reproduction; no paid provider calls, credential changes, new diagnostics framework, upstream write, speculative implementation or duplicate diagnostic task. Reporting: preserve owner goal, code facts vs operations report vs hypothesis. Include current task commit and relevant references, no secret values/internal paths in any later public artifact. Use existing report-progress for this queue when a stage result is actually ready; no fabricated PR, empty commit or blanket production PASS.
dreampiler commented 2026-10-11 12:21:16 +09:00
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1단계 조사 완료(내부 보고, 코드 변경·커밋·공개 PR 없음). 근거: agentctl 자체 덤프 C:\Users\dream.kandev\logs\agentctl-goroutines-20261011T024031Z.txt(657819B, 10277줄, 588 goroutine)에서 유일한 정체는 permission 응답 무한 대기 4건(모두 manager.go:3539 deployed / 현재 소스 3522행 select, [select, 340~344분])이며 [chan send]·sendUpdateBlocking·persistDelivery 는 0건. 코드 확인: manager.go:3522-3552 응답대기 select 에 timeout 없음, 3650-3675 detached 는 sendUpdateBlocking/attached 는 5초 타이머, journal/location.go:44-48 저널은 인스턴스별 별도 파일. upstream dac20ecf44 read-only 비교: delivery_batch.go 에 manager.lifetimeCtx 바인딩 w.ctx 신설(포크의 context.Background() 결손 실재), blocking_send.go 무변경, permission 응답대기·mergeStops 는 upstream 동일(포크 고유 회귀 아님). 남은 것: 전역 전파는 미확정이며 구현 결함이 아니라 증거 공백이다. 후속 제안: ① 운영/AIWS 가 실제 정지 진행 중 agentctl 덤프를 제공하면 H3(업데이트채널 포화 vs 백엔드 소비 중단) 판별, ② 그 뒤 별도 후속 작업/PR 로 권한 응답 유한 대기 도입 및 upstream 취소 가능 delivery writer 채택.

1단계 조사 완료(내부 보고, 코드 변경·커밋·공개 PR 없음). 근거: agentctl 자체 덤프 C:\Users\dream\.kandev\logs\agentctl-goroutines-20261011T024031Z.txt(657819B, 10277줄, 588 goroutine)에서 유일한 정체는 permission 응답 무한 대기 4건(모두 manager.go:3539 deployed / 현재 소스 3522행 select, [select, 340~344분])이며 [chan send]·sendUpdateBlocking·persistDelivery 는 0건. 코드 확인: manager.go:3522-3552 응답대기 select 에 timeout 없음, 3650-3675 detached 는 sendUpdateBlocking/attached 는 5초 타이머, journal/location.go:44-48 저널은 인스턴스별 별도 파일. upstream dac20ecf44 read-only 비교: delivery_batch.go 에 manager.lifetimeCtx 바인딩 w.ctx 신설(포크의 context.Background() 결손 실재), blocking_send.go 무변경, permission 응답대기·mergeStops 는 upstream 동일(포크 고유 회귀 아님). 남은 것: 전역 전파는 미확정이며 구현 결함이 아니라 증거 공백이다. 후속 제안: ① 운영/AIWS 가 실제 정지 진행 중 agentctl 덤프를 제공하면 H3(업데이트채널 포화 vs 백엔드 소비 중단) 판별, ② 그 뒤 별도 후속 작업/PR 로 권한 응답 유한 대기 도입 및 upstream 취소 가능 delivery writer 채택.
dreampiler commented 2026-10-11 18:13:56 +09:00
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W092-Finish-c20-jobsheet-test

W092-Finish-c20-jobsheet-test
dreampiler commented 2026-10-11 18:14:32 +09:00
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W092 Finish c20 최종. PR222 merge 6af4a38681/head 738964f02f/Review PASS 확정, 최종 main 6a6d3d76 정합. 병합판 6a6d3d76 격리 15분(동일PID/health200/panic0)은 운영 15:46 KST 교체 시 확인. permission timeout 후 agent 계속 진행 merged-entry 입증 없음 한계 유지. backend pre-HTTP 기한은 별도 작업으로 분리, #222 재오픈 없음.

W092 Finish c20 최종. PR222 merge 6af4a38681/head 738964f02f/Review PASS 확정, 최종 main 6a6d3d76 정합. 병합판 6a6d3d76 격리 15분(동일PID/health200/panic0)은 운영 15:46 KST 교체 시 확인. permission timeout 후 agent 계속 진행 merged-entry 입증 없음 한계 유지. backend pre-HTTP 기한은 별도 작업으로 분리, #222 재오픈 없음.
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Reference: dreampiler/kandev#65
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