JBAS014771: Services with missing/unavailable dependencies... Validator is missing .. when trying to specify the start order of sub deployments of an EAR and using @DependsOn

Issue

• We are using @DependsOn to ensure some EJB Singletons & Stateless EJBs start in the order we need, our application is failing to deploy with messages such as shown below. Our EJBs / Singletons are contained is sub deployments of an ear with the application.xml such as shown below:

<application xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/application_6.xsd"
  version="6">
  <module>
    <ejb>first.jar</ejb>
  </module>
  <module>
    <ejb>second.jar</ejb>
  </module>
  <initialize-in-order>true</initialize-in-order>
</application>

17:38:41,677 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS014612: Operation ("deploy") failed - address: ([("deployment" => "start-order.ear")]) - failure description: {"JBAS014771: Services with missing/unavailable dependencies" => [
    "jboss.naming.context.java.comp.start-order.second.SecondSingleton.Validator is missing [jboss.naming.context.java.comp.start-order.second.SecondSingleton]",
    "jboss.deployment.unit.\"start-order.ear\".deploymentCompleteService is missing [jboss.deployment.subunit.\"start-order.ear\".\"second.jar\".deploymentCompleteService]",
    "jboss.deployment.subunit.\"start-order.ear\".\"first.jar\".component.FirstSingleton.START is missing [jboss.deployment.subunit.\"start-order.ear\".\"second.jar\".component.SecondSingleton.START]",
    "jboss.naming.context.java.comp.start-order.second.SecondSingleton.ValidatorFactory is missing [jboss.naming.context.java.comp.start-order.second.SecondSingleton]"
]}

JBAS014775:    New missing/unsatisfied dependencies:
      service jboss.deployment.subunit."start-order.ear"."second.jar".component.SecondSingleton.START (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START] 
      service jboss.deployment.subunit."start-order.ear"."second.jar".deploymentCompleteService (missing) dependents: [service jboss.deployment.unit."start-order.ear".deploymentCompleteService] 
      service jboss.naming.context.java.comp.start-order.second.SecondSingleton (missing) dependents: [service jboss.naming.context.java.comp.start-order.second.SecondSingleton.Validator, service jboss.naming.context.java.comp.start-order.second.SecondSingleton.ValidatorFactory] 

JBAS014775:    New missing/unsatisfied dependencies:
      service jboss.deployment.subunit."start-order.ear"."first.jar".INSTALL (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."second.jar".INSTALL] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.CREATE (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".deploymentCompleteService, service jboss.deployment.subunit."start-order.ear"."first.jar".moduleDeploymentRuntimeInformationStart] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.VIEW."com.jboss.examples.ee6.ejb.FirstSingleton".LOCAL (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".deploymentCompleteService (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."second.jar".INSTALL, service jboss.deployment.unit."start-order.ear".deploymentCompleteService] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".jndiDependencyService (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START] 
      service jboss.deployment.subunit."start-order.ear"."first.jar".moduleDeploymentRuntimeInformation (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START, service jboss.deployment.subunit."start-order.ear"."first.jar".moduleDeploymentRuntimeInformationStart] 
      service jboss.naming.context.java.comp.start-order.first.FirstSingleton (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."first.jar".component.FirstSingleton.START] 
      service jboss.naming.context.java.module.start-order.second (missing) dependents: [service jboss.deployment.subunit."start-order.ear"."second.jar".INSTALL]