Failed to deploy ear that contains web service

[burgosjc]

I have the following error when deploying an EAR which contains a jar with the following simple web service

@Stateless
@WebService(serviceName="MensajeService")
public class MensajeService {

   @WebMethod
   public String hola(String nombre){
      return "Hola "+nombre;
   }
}

The error is generated by the following

Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011030: Could not configure component MensajeService
          at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:92)
          at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
          ... 5 more
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011054: Could not find default constructor for interface MensajeService
          at org.jboss.as.ee.component.ComponentDescription$DefaultComponentConfigurator.configure(ComponentDescription.java:606)
          at org.jboss.as.ee.component.deployers.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:81)
          ... 6 more

If I remove the jar from the web service, deployed without problem and the strange thing is that I have another application that also uses web services and deploy no errors.

[eocampos]

Could not find default constructor for interface MensajeService

The error says that your implementing class needs a default constructor, try with:

@Stateless
@WebService(serviceName="MensajeService")
 public class MensajeService {
      public void MensajeService() {}
      @WebMethod
     public String hola(String nombre) {
         return "Hola " + nombre;     }
}

[sfcoy]

Indeed. The EJB spec actually makes this a requirement:

{quote}4.9.2 Session Bean Class
...
• The class must have a public constructor that takes no parameters. The container uses this constructor to create instances of the session bean class.
{quote}