EC
3229
MySQLERRORNotableLockingHIGH confidence

Locking service lock acquisition timed out

Production Risk

Medium — operation fails; application must handle and retry.

Why it happens
  1. 1A locking service lock could not be acquired within the specified timeout.
  2. 2Another session holds a conflicting lock for longer than the timeout period.
How to reproduce
trigger — this will error
trigger — this will error
SELECT service_get_write_locks('ns', 'shared_resource', 3);

expected output

ERROR 3229 (HY000): Locking service lock wait timeout exceeded.

Fix 1

Increase the timeout value

Increase the timeout value
SELECT service_get_write_locks('ns', 'shared_resource', 30);

Why this works

Longer timeout gives more time for conflicting sessions to release locks.

Fix 2

Investigate long-running lock holders

Investigate long-running lock holders
SELECT * FROM information_schema.PROCESSLIST WHERE STATE LIKE '%lock%';

Why this works

Identify sessions holding the contested lock and address the root cause.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 3229 ER_LOCKING_SERVICE_TIMEOUT

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

← All MySQL errors