SQLITE_IOERR_RDLOCK
SQLiteERRORNotableI/O Errorofficial confidence

I/O error checking reserved read lock

Production Risk

Medium — transaction cannot start.

What this means

SQLITE_IOERR_RDLOCK (2314) is returned when the OS reports an error while SQLite checks whether a reserved read lock is held on the database file.

Why it happens
  1. 1OS error during fcntl() lock check.
  2. 2Filesystem does not support advisory lock queries.
How to reproduce

Lock state checks during transaction begin.

trigger — this will error
trigger — this will error
# Surfaces as disk I/O error during BEGIN

expected output

sqlite3.DatabaseError: disk I/O error

Fix 1

Fix 2

Sources
Official documentation ↗

sqlite3.h — SQLITE_IOERR_RDLOCK = 2314

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