The task cannot be processed further until the current edit session is activated. When this occurs, task processing will continue. The user can exit the deployer tool without affecting the task.
and the deployment never happens.
This happens because there you may have mistakenly/intentionally changed certain parameters in the WLS console, and did not activate/revert those. If you open the console (http://host:port/console), you see the ‘Activate Changes’ button enabled at the left top corner.
You just have to either activate/revert the changes, and the deployment happens now.