well I have read some posts and examples around there but not a clue

the persistence.xml is

<?xml version="1.0" encoding="UTF-8"?>

<persistence version="2.0"

   xmlns="http://java.sun.com/xml/ns/persistence"

   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

   xsi:schemaLocation="http://java.sun.com/xml/ns/persistence

                       http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

   <persistence-unit name="administration-server">

      <jta-data-source>java:jboss/datasources/administration-serverDS</jta-data-source>

      <properties>

         <property name="hibernate.hbm2ddl.auto" value="validate" />

         <property name="hibernate.show_sql" value="true" />

      </properties>

   </persistence-unit>

   <persistence-unit name="migration-server">

      <jta-data-source>java:jboss/datasources/migration-serverDS</jta-data-source>

      <properties>

         <property name="hibernate.hbm2ddl.auto" value="validate" />

         <property name="hibernate.show_sql" value="true" />

      </properties>

   </persistence-unit>

</persistence>

the Resources.java is

in my PersonaResourceRESTService I had to remove the prestablish @RequestScoped (javax.enterprise.context.RequestScoped) so the method lookupPersonaByID is properly called, otherwise I get the injection exception

so having my PersonaRepository been @Stateless or @RequestScoped gave errors

injection is not a problem

@Inject @DefaultDB

private EntityManager em;

but trying to create the builder...

final CriteriaBuilder cb = em.getCriteriaBuilder();

gives the same error

org.jboss.resteasy.spi.UnhandledException: java.lang.IllegalArgumentException: JBAS016069: Error injecting persistence unit into CDI managed bean. Can't find a persistence unit named administration-server in deployment administration-server.war

org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:340)

org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:214)

org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:190)

org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:540)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:502)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)

org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)

javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62)