From 870e40a6db1f1950c814b2b828be472a049dcc7d Mon Sep 17 00:00:00 2001
From: thug0bin <thug0bin@users.noreply.git.0bin.in>
Date: Fri, 27 Feb 2026 15:41:28 +0900
Subject: [PATCH] =?UTF-8?q?fix:=20SQLite=20=EC=97=B0=EA=B2=B0=20=EC=B2=B4?=
 =?UTF-8?q?=ED=81=AC=20=EA=B0=95=ED=99=94?=
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- 커서 생성/실행/close로 연결 상태 확인
- 연결 닫힐 때 명시적 close 호출
- I/O operation on closed file 에러 방지
---
 backend/db/dbsetup.py | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/backend/db/dbsetup.py b/backend/db/dbsetup.py
index 0007e9a..c209703 100644
--- a/backend/db/dbsetup.py
+++ b/backend/db/dbsetup.py
@@ -193,11 +193,20 @@ class DatabaseManager:
         Returns:
             sqlite3.Connection: SQLite 연결 객체
         """
-        # 연결이 닫혀있으면 재생성
+        # 연결 유효성 체크 강화
         if self.sqlite_conn is not None:
             try:
-                self.sqlite_conn.execute("SELECT 1")
-            except Exception:
+                # 연결 상태 확인
+                cursor = self.sqlite_conn.cursor()
+                cursor.execute("SELECT 1")
+                cursor.fetchone()
+                cursor.close()
+            except Exception as e:
+                print(f"[DB Manager] SQLite 연결 체크 실패, 재연결: {e}")
+                try:
+                    self.sqlite_conn.close()
+                except:
+                    pass
                 self.sqlite_conn = None
 
         if self.sqlite_conn is None: