python data_error ai_generated true

sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) database is locked

ID: python/flask-sqlalchemy-database-lock

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-09-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

SQLite database locked due to concurrent writes or uncommitted transactions in Flask app.

generic

中文

由于 Flask 应用中的并发写入或未提交事务，SQLite 数据库被锁定。

Workarounds

  1. 80% success 
    Set SQLite timeout: engine = create_engine('sqlite:///app.db', connect_args={'timeout': 30})
  2. 90% success 
    Use WAL mode: with engine.connect() as conn:
    conn.execute("PRAGMA journal_mode=WAL")

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Timeout only waits for lock release; if transaction never commits, it still fails.

  2. 80% fail

    Uncommitted sessions hold locks; need explicit commit or rollback.