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.
Here are the most common solutions based on similar "stuck lock" scenarios: 1. Database/Liquibase Lock Issue
the provided "release lock" script or command (e.g., .\runcommand.bat LockManager releaseLock update_lock ) Stack Overflow. Restart the service. 4. General Troubleshooting Failed To Query Lock Null Status
If a large query was just killed, it may be rolling back. Wait a few minutes Stack Overflow .
Based on common technical issues, the error "Failed To Query Lock Null Status" often refers to a situation where a database or system process (like Liquibase or Markvision) cannot determine if a resource is locked because the lock entry itself is missing, corrupt, or improper. This is frequently caused by a previous process being terminated prematurely. If this occurs during a database migration or
UPDATE DATABASECHANGELOGLOCK SET LOCKED = 0, LOCKGRANTED = NULL, LOCKEDBY = NULL WHERE LOCKED = 1; Use code with caution. Copied to clipboard
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) General Troubleshooting If a large query was just
For systems like Endeca or Markvision, the lock is managed by a service. Stop the application service.