SQLITE_IOERR_CLOSEWARNINGTier 2 — Caution⚠️ MEDIUM confidenceI/O error closing file descriptor
Category: I/O ErrorVersions: 3.0+
🔴 Production Risk Error
Medium — indicates possible write-back failure; check disk.
What this means
SQLITE_IOERR_CLOSE (4106) is returned when close() on a database-related file descriptor returns an error. On Linux, close() errors are rare but may indicate a write-back failure.
Why it happens
- 1OS write-back error on close() (Linux: EIO flushing dirty pages).
- 2File descriptor already closed (double-close bug in VFS).
How to reproduce
SQLite connection close when the OS close() syscall fails.
trigger — this will ERROR
# Surfaces when closing database connection
conn.close() # may raise OperationalError in some driverssqlite3.OperationalError: disk I/O error
Fix 1
Why this works
Check disk health — close() errors often indicate a deferred write failure.
Fix 2
Why this works
Ensure no double-close bugs exist in custom VFS implementations.
Sources
📚 Official docs: https://www.sqlite.org/rescode.html#ioerr_close
🔧 Source ref: sqlite3.h — SQLITE_IOERR_CLOSE = 4106
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 →