ER_LOCKING_SERVICE_WRONG_NAME occurs when GET_LOCK, RELEASE_LOCK, or IS_USED_LOCK is supplied a NULL, empty, or over-64-character lock name.
MySQL ER_LOCKING_SERVICE_WRONG_NAME (3131) means the lock name given to GET_LOCK or related functions is NULL, blank, or longer than 64 characters. Supply a non-NULL, non-empty name of ≤64 characters like "session_lock" to resolve the error.
ER_LOCKING_SERVICE_WRONG_NAME
MySQL triggers error 3131 (SQLSTATE 42000) with message "Incorrect locking service lock name '%s'" when a session calls GET_LOCK, RELEASE_LOCK, or IS_USED_LOCK using an invalid lock identifier.
The identifier must be a non-NULL, non-empty string not exceeding 64 characters. Any deviation violates the locking service rules introduced in MySQL 5.7.8, causing the statement to fail and no lock action to occur.
Named locks coordinate concurrent processes. Allowing this error to persist risks lost updates or duplicate work, so prompt correction is crucial.
The most common trigger is passing a NULL variable or an empty literal ("") to GET_LOCK. Client libraries that transform undefined values into NULL frequently create this condition.
The second trigger is providing an overly long identifier. Long concatenated strings that include dynamic user or timestamp data can silently exceed 64 characters.
A rare cause is truncation during character-set conversion, where multibyte characters push the final byte count over the limit at execution time.
Validate the lock name before calling locking functions. Ensure the variable is not NULL and that LENGTH(lock_name) ≤ 64. Trim or hash overly long strings.
Always call RELEASE_LOCK with the exact same validated name used in GET_LOCK. Mismatched names can recreate the error during lock release.
Refactor application code to centralize lock-name generation, making boundary checks easier and consistent across modules.
API servers using NULL session IDs - When a web request lacks a session cookie, the generated lock name may be NULL. Provide a fallback such as 'anonymous_session'.
Cron jobs concatenating timestamps - String like 'report_20240610123045' can exceed 64 characters when extra metadata is appended. Truncate to 64 or less.
Microservices sharing locks - Different services may choose slightly different prefixes. Standardize naming in a shared utility to avoid accidental empties or overflows.
Enforce length checks in stored procedures or helper functions that wrap GET_LOCK and RELEASE_LOCK. Reject invalid names before the database call.
Store lock names in VARCHAR(64) columns when persisting them, letting the column length constraint act as an early guardrail.
Use Galaxy's AI copilot to scan SQL for potential NULL or over-length literals and suggest safe naming patterns directly in the editor.
Lock wait timeout exceeded (1205) - occurs when a session waits too long for a named lock. Optimize lock duration or increase timeout.
Lock table is full (1206) - indicates the internal lock table cannot allocate more entries. Increase innodb_buffer_pool or review lock usage.
ER_USER_LOCK_DEADLOCK (3058) - arises when RELEASE_LOCK collides with another lock holder. Ensure proper acquisition and release order.
Application variables sometimes hold NULL when a session or job identifier is missing, immediately violating lock-name rules.
Developers may initialize a lock variable with '' and forget to populate it, causing an empty name error at runtime.
Dynamic locks built from usernames, UUIDs, and timestamps can quietly exceed the 64-character ceiling, triggering error 3131.
Occurs when a session cannot acquire a lock within the specified timeout. Increase timeout or optimize lock duration.
Raised when two sessions deadlock over named locks. Ensure consistent lock acquisition order.
InnoDB cannot allocate additional lock entries. Review transaction size or expand the buffer pool.
No. The limit is hard-coded in MySQL. Instead, shorten or hash your lock names.
No lock is created or modified when this error occurs, so existing locks remain unchanged.
Yes. ER_LOCKING_SERVICE_WRONG_NAME was introduced in MySQL 5.7.8. Earlier versions silently truncated long names.
Galaxy highlights invalid literals, autocompletes safe lock names, and lets teams endorse validated locking patterns to prevent runtime errors.
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