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SQLITE_E_IOERR_UNLOCK
SQLITE_E_IOERR_UNLOCK corresponds to SQLITE_IOERR_UNLOCK: the VFS failed in its xUnlock operation while releasing an SQLite file lock.
What to check for SQLITE_E_IOERR_UNLOCK
- Check for filesystem or VFS implementations that do not reliably support advisory file locks.
- Avoid multiple independent writers through network shares or filesystem proxies whose lock semantics are uncertain.
- Capture the SQLite journal mode and connection topology before changing concurrency settings.
PRAGMA journal_mode;SQLite: Result and Error Codes
SQLite: File Locking and Concurrency
SQLite: Network Filesystem Considerations
Diagnostic interpretation
This result has the HRESULT value 0x87AF080A. AllStat records the condition as “SQLITE_IOERR_UNLOCK”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the sqlite / ioerr / unlock operation.
- check the documented return contract of the specific API because the same HRESULT can require different recovery in different interfaces.
Retry and recovery
Retry this result only when the owning API documents a transient state or after the condition described as “SQLITE_IOERR_UNLOCK” has changed.
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