# Complete - m-large-payload-followup-optimization/03_kotlin_tcp_parallel

## 완료 일시

2026-06-14T08:28:02Z

## 요약

Kotlin TCP read loop starvation 및 partial-frame timeout desync를 수정하고 TCP full parallel required skip 해제를 검증했다. loop count=2, final verdict=PASS.

## 루프 이력

| Plan | Review | Verdict | 메모 |
|------|--------|---------|------|
| `plan_cloud_G07_0.log` | `code_review_cloud_G07_0.log` | FAIL | `SocketTimeoutException` 후 partial frame offset을 잃는 Required issue 발견 |
| `plan_cloud_G07_1.log` | `code_review_cloud_G07_1.log` | PASS | offset-preserving read와 delayed partial frame regression test로 Required issue 해소 |

## 구현/정리 내용

- Kotlin `TcpClient` TCP read loop를 read 전용 dispatcher로 분리하고 `socket.soTimeout` 기반 poll을 적용했다.
- header/payload read를 offset-preserving `readExact`로 바꿔 timeout이 frame 중간에서 발생해도 desync되지 않게 했다.
- TCP parallel clients>=128 required skip을 제거하고 clients=16/128/512/1024 full parallel row를 실제 측정했다.
- `TcpTest`에 close-while-read-parked 및 delayed partial frame(header split, payload split) 회귀 테스트를 추가했다.

## 최종 검증

- `cd kotlin && ./gradlew --offline test` - PASS; `BUILD SUCCESSFUL in 2s`, 11 actionable tasks 중 1 executed, 10 up-to-date.
- `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_stress.sh --full --lang kotlin --transport tcp --profile parallel` - PASS; `DONE kotlin: PASS (rows=4 skips=0 required_skips=0 violations=0)`, result record=`agent-test/runs/20260614-082714-proto-socket-stress-full.md`.
- `git diff --check` - PASS; whitespace/error output 없음.

## Roadmap Completion

- Milestone: `agent-roadmap/milestones/large-payload-followup-optimization.md`
- Completed task ids:
  - `kotlin-tcp-parallel-unskip-path`: PASS; evidence=`agent-task/archive/2026/06/m-large-payload-followup-optimization/03_kotlin_tcp_parallel/plan_cloud_G07_1.log`, `agent-task/archive/2026/06/m-large-payload-followup-optimization/03_kotlin_tcp_parallel/code_review_cloud_G07_1.log`; verification=`cd kotlin && ./gradlew --offline test`, `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_stress.sh --full --lang kotlin --transport tcp --profile parallel`, `agent-test/runs/20260614-082714-proto-socket-stress-full.md`
- Not completed task ids: 없음

## 잔여 Nit

- 없음

## 후속 작업

- 없음
