Error Code 500 on Embedded Glassfish 4.1.1 with Arquillian - maven

Question

I am quite new to Java EE and Arquillian. I am getting problems if I want to deploy my simple project into the embedded glassfish 4.1.1 server. I can succesfully pass the deployment, but I can not access the methods that i implemented. I am getting error code 500, while i expect 200.
my deployment:
public class AuthTest
{
#Deployment(testable = false)
public static WebArchive createDeployment()
{
System.out.println("\nin createDeployment");
// File[] libs = Maven.resolver().loadPomFromFile("pom.xml").importRuntimeAndTestDependencies().asFile();
WebArchive archive = ShrinkWrap.create(WebArchive.class, "ArquillianHepInterface.war")
.addClasses(AuthEndpoint.class)
.addPackage(Database.class.getPackage())
.addPackage(DeviceAccessDBEntry.class.getPackage())
.addPackage(WebsiteAccessDBEntry.class.getPackage())
.addPackage(DeviceInfo.class.getPackage())
.addPackage(LoginInfo.class.getPackage())
.addPackage(ResponseBoolean.class.getPackage())
.addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml")
.addAsWebInfResource(new File("src/main/webapp", "WEB-INF/web.xml"))
.addAsWebInfResource(new File("src/main/webapp", "WEB-INF/glassfish-web.xml"))
.addAsResource("META-INF/persistence.xml")
// .addAsLibraries(libs)
;
System.out.println("\nende createDeployment");
return archive;
}
#ArquillianResource
protected URL contextPath;
#Test
public void registerUUIDTest()
{
DeviceInfo newUser = new DeviceInfo();
newUser.setDate("2014-12-12");
newUser.setUuid("xyz");
Response i = expect().statusCode(200).when().given().
contentType("application/json").body(newUser)
.post(this.contextPath + "AUTHENTICATION/CREATEMOBILELOGIN")
;
}
my AuthEndpoint class:
#Path("/AUTHENTICATION")
public class AuthEndpoint
{
#Inject
private DatabaseInterface database;
#POST
#Produces({ "application/json" })
#Consumes({ "application/json" })
#Path("CREATEMOBILELOGIN")
public LoginInfo createMobileLogin(DeviceInfo info)
{
System.out.println("RICHTIGES FILE");
System.err.println();
LoginInfo response = null;
if (info != null && info.getUuid() != null)
{
String password = this.database.registerDevice(info.getUuid());
if (password != null)
{
response = new LoginInfo();
response.setPw(password);
response.setUuid(info.getUuid());
}
}
return response;
}
}
I am getting:
SEVERE: WebModule[/ArquillianHepInterface]StandardWrapper.Throwable
Why is that happening? I do not understand where my problem is...
I supposed that I have problems while I am using glassfish 4.1.1...? I want simply to call the Methods in the AuthEndpoint class throught the Arquillian TestClass to verify that a single have been created...
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Arquillian Rest Demo</display-name>
<servlet>
<display-name>JAX-RS REST Servlet</display-name>
<servlet-name>REST-Servlet</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>REST-Servlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
glassfish-web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app>
<context-root>/ArquillianHepInterface</context-root>
<class-loader delegate="true" />
</glassfish-web-app>
My beans.xml file is empty.
The methods that AuthEndpoint uses are in another maven project that I have compiled and added in the maven dependencies...
I would appreciate any help...