Failed To Query Lock Null Status -

If a large query was just killed, it may be rolling back. Wait a few minutes Stack Overflow .

If you are certain no other process is running, you can sometimes delete the lock row entirely Stack Overflow. 2. File-Based Lock (.lock file)

If this happens in a development environment (Git, WebDAV) or application using local files Stack Overflow : Failed To Query Lock Null Status

For systems like Endeca or Markvision, the lock is managed by a service. Stop the application service.

the service or machine to ensure the process holding the file releases it Stack Overflow . 3. Application-Specific Lock (Endeca/Markvision) If a large query was just killed, it may be rolling back

Here are the most common solutions based on similar "stuck lock" scenarios: 1. Database/Liquibase Lock Issue

Ensure the application user has write access to the lock database or file directory Stack Overflow. To give you a more specific solution, could you tell me: Which application or database is producing this error? the service or machine to ensure the process

If this occurs during a database migration or application startup (e.g., Liquibase , Markvision Enterprise), the DATABASECHANGELOGLOCK table is likely stuck. Manually reset the lock table.