Unable to find a single main class from the following candidates [com.izeye.app1.Application, com.izeye.app2.Application]

You can encounter the following error when you try to execute a 'bootRun' task:

* What went wrong:
Execution failed for task ':findMainClass'.
> Unable to find a single main class from the following candidates [com.izeye.app1.Application, com.izeye.app2.Application]

Add the following line in your 'build.gradle':

mainClassName = "com.izeye.app1.Application"