What is the meaning of the org.apache.oozie.util.ParameterVerifier warning "The application does not define formal parameters in its XML definition" ?
This is happening due to your workflow.xml or coordinator.xml not containing a child node for "parameters".
The Oozie code for this check can be found here.
You can find an example (second code section) here.
Note: It appears that this is a benign warning ... unless these parameters are required for something else.