MessageBodyWriter not found for media type=application/xml, type=class java.util.ArrayList, genericType=java.util.List<java.lang.String>.

gistfile1.txt

    @GET
    @javax.ws.rs.Path("l")
    @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
    @Consumes({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
    public Response Ef_Get_Anula_Documento() throws IOException {
        GenericEntity<List<String>> entity = new GenericEntity<List<String>>(getText()) {
        };
        Response response = Response.ok(entity).build();
        return response;

    }

    public ArrayList<String> getText() throws IOException {

        ArrayList<String> a = new ArrayList<>();
        //Scanner Example - read file line by line in Java using Scanner
        FileInputStream fis = new FileInputStream("C:/new5.log");
        Scanner scanner = new Scanner(fis);

        while (scanner.hasNextLine()) {
            a.add(scanner.nextLine());
        }

        return a;
    }