From db4322006de2d892ce15a635e50c1f3b03d705d6 Mon Sep 17 00:00:00 2001
From: gahusb <bgg8988@gmail.com>
Date: Wed, 13 May 2026 16:50:25 +0900
Subject: [PATCH] =?UTF-8?q?fix(stock-lab):=20screener=20DB=20connection=20?=
 =?UTF-8?q?WAL=20=EB=AA=A8=EB=93=9C=20+=20busy=5Ftimeout=2030s?=
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snapshot/refresh 직후 /run mode=auto가 'database is locked'으로 500
실패하던 증상 fix. SQLite 기본 rollback journal 모드 + busy_timeout=0
조합에서 long write transaction과 read가 겹치면 즉시 OperationalError.

PRAGMA journal_mode=WAL: reader가 writer를 block 안 함
PRAGMA busy_timeout=30000: 30초 대기 후 timeout (즉시 실패 X)
sqlite3.connect timeout=30: connection 획득 자체에도 대기 적용

agent-office 자동 잡 16:30 KST 흐름 안정화.
---
 stock-lab/app/screener/router.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/stock-lab/app/screener/router.py b/stock-lab/app/screener/router.py
index aadd10f..bbf6905 100644
--- a/stock-lab/app/screener/router.py
+++ b/stock-lab/app/screener/router.py
@@ -45,7 +45,12 @@ def _db_path() -> str:
 
 
 def _conn() -> sqlite3.Connection:
-    return sqlite3.connect(_db_path())
+    # WAL 모드 + busy_timeout으로 동시 read/write lock 회피
+    # (snapshot/refresh 직후 /run이 SELECT 시 OperationalError 'database is locked' 방지)
+    conn = sqlite3.connect(_db_path(), timeout=30.0)
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA busy_timeout=30000")
+    return conn
 
 
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