SonarException: The project is already been analysing.
I was getting this error when running a Sonar analysis recently.
This was caused by the Jenkins/Sonar process getting killed while the project analysis is underway. Sonar now uses a database semaphore to prevent multiple builds running at the same time, but if the job gets terminated then the semaphores don’t get cleaned up.
To fix the problem: Log into the database and delete any rows in the ‘semaphores’ table.