ColdFusion 11 REST warnings in log file?

I'm building a RESTful API with ColdFusion 11.  Today I noticed there are a ton of warnings being logged to the coldfusion-error log file.  For example:

Mar 04, 2015 8:09:52 AM com.sun.jersey.spi.inject.Errors processErrorMessages

WARNING: The following warnings have been detected with resource and/or provider classes:

WARNING: A HTTP GET method, public void api.Country.GetCountry() throws coldfusion.xml.rpc.CFCInvocationException, MUST return a non-void type.

WARNING: A HTTP GET method, public void api.Log.GetLog(java.lang.Double) throws coldfusion.xml.rpc.CFCInvocationException, MUST return a non-void type.

WARNING: A HTTP GET method, public void api.Logout.LogoutUser(java.lang.Double) throws coldfusion.xml.rpc.CFCInvocationException, MUST return a non-void type.

Here is one of my API endpoint functions:

<cfcomponent restpath="country" rest="true" output="false" extends="cfc.data">

     <cffunction name="getCountry" access="remote" output="false" httpmethod="get" returntype="void">

          <cfset LOCAL.countryData = getCountryData()>

          <cfset LOCAL.restResponse = StructNew()>

          <cfset restResponse = REQUEST.apiObj.response(200, countryData)>

          <cfset restSetResponse(restResponse)>

     </cffunction>

</cfcomponent>

My understanding is that returntype=void is a MUST in order to use restSetResponse().  This code works great, but the warnings in the log file don't make sense to me. 

Am I doing something wrong? 

Or is this some sort of "gap" where logging isn't factoring in REST services/functionality? 

Is it possible to disable warning messages from getting logged? 

Thank you!

Brian White