2794712 - Deployment fails due to service [tc~bl~deploy_controller] cannot lock the database

During SUM Tool upgrade process, you come across the simular issue as screenshot below

From deply_x_trc, you can see errors which caused issue is the following;

[EXCEPTION]
com.sap.engine.services.dc.cm.deploy.DeploymentException: This deployment won't be started, because service [tc~bl~deploy_controller] cannot lock the database.
Hint: 1). Retry, when there is no system activity.

Caused by: com.sap.engine.services.dc.cm.lock.DCAlreadyLockedException: Cannot perform 'lock' operation in 'DB' for argument 'deploy_controller/lock/single_thread' and user 'Deploy', because the argument 'deploy_controller/lock/single_thread' and user 'Deploy' is already locked.

Caused by: com.sap.engine.frame.core.configuration.NameAlreadyExistsException: A configuration with the path "deploy_controller/lock/single_thread" does already exist.

• Release Independent
• SAP NetWeaver

deploy_controller/lock/single_thread, Cannot perform 'lock' operation, Retry, when there is no system activity , KBA , BC-JAS-DPL , Deployment , Problem