I'm trying to get my EC2 plugin to apply a IAM role to the agents it starts up. When I set the IAM Instance Profile with the ARN (arn:aws:iam::<my account id>:instance-profile/<my instance profile> it fails to create the instance. Be it on demand or manually. I'll put the log in the comments but it hasn't provided any insight as I can't see exactly what the AWS Java sdk is doing.

This feature was introduced in JENKINS-17086