Does the CoroutineExceptionHandler capture also a CancellatioException in the case of launch? What I would like to do is to launch a bunch of coroutines under a SupervisorJob, and I want to, for robustness, relaunch the coroutine if it fails, but not if it's cancelled.

That should work. Cancellation exceptions are not handled by it, but their cause, if applicable, is.

I think you should only relaunch if specific exceptions occur

u think so? why