SQLITE_IOERR_UNLOCKERRORTier 2 — Caution⚠️ MEDIUM confidenceI/O error releasing file lock
Category: I/O ErrorVersions: 3.0+
🔴 Production Risk Error
High — other connections may remain blocked on the lock.
What this means
SQLITE_IOERR_UNLOCK (2058) is returned when the OS reports an error while SQLite tries to release (unlock) a file lock after completing a transaction.
Why it happens
- 1OS error on fcntl(F_UNLCK) during lock release.
- 2File descriptor invalidated before unlock (e.g., file closed by signal handler).
How to reproduce
Post-commit lock release failure.
trigger — this will ERROR
# SQLITE_IOERR_UNLOCK surfaces as disk I/O error after COMMITsqlite3.DatabaseError: disk I/O error
Fix 1
Why this works
Close and reopen the database connection to clear the lock state.
Fix 2
Why this works
Check for OS-level errors in system logs.
Sources
📚 Official docs: https://www.sqlite.org/rescode.html#ioerr_unlock
🔧 Source ref: sqlite3.h — SQLITE_IOERR_UNLOCK = 2058
Confidence assessment
⚠️ MEDIUM confidence
Stable.
See also
⚙️ This error reference was generated with AI assistance and reviewed for accuracy. Examples are provided to illustrate common scenarios and may not cover every case. Always test fixes in a development environment before applying to production. Spotted an error? Suggest a correction →