From the beginning, a goal of Java EE has been to provide reliable and predictable behavior
for applications. Applications express their requirements on aspects of the operational
environment using deployment descriptors and annotations. The Deployer has visibility into
these requirements of the application and can map them to the facilities of the operational
environment. The application expects all of its requirements to be met before it starts
execution. There's no need for the application to check whether its resource requirements
have been met.

The Java EE platform specification needs to make it clear that deployment MUST fail if the
resource requirements of the application can not be met. Among other things, this means
that all resource references must be mapped to actual resources in the operational environment.