OSQLAsynchQuery does not return edges

gistfile1.txt

import com.orientechnologies.orient.core.command.OCommandResultListener;
import com.orientechnologies.orient.core.sql.query.OSQLAsynchQuery;
import com.orientechnologies.orient.core.sql.query.OSQLSynchQuery;
import com.tinkerpop.blueprints.Direction;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.impls.orient.OrientGraph;
import com.tinkerpop.blueprints.impls.orient.OrientVertex;

public class OrientdbTest {

	public static void main(String[] args) {
		final OrientGraph graph = new OrientGraph(
				"remote:localhost/GratefulDeadConcerts", "admin", "admin");

		OrientVertex v1 = graph.addVertex(null);
		v1.setProperty("name", "xxx");
		OrientVertex v1_1 = graph.addVertex(null);
		OrientVertex v1_2 = graph.addVertex(null);

		graph.addEdge(null, v1, v1_1, "has");
		graph.addEdge(null, v1, v1_2, "has");

		graph.commit();

		// the following code does not print any edge ...
		graph.command(
				new OSQLAsynchQuery<Vertex>("select from " + v1.getId(),
						new OCommandResultListener() {
							public boolean result(Object iRecord) {
								Vertex doc = graph.getVertex(iRecord);
								System.out.println("V " + doc);
								for (Edge e : doc.getEdges(Direction.BOTH)) {
									System.out.println("E " + e);
								}
								return true;
							}

							public void end() {
								// TODO Auto-generated method stub
							}
						})).execute();

		// .. in sync mode it works
		Iterable<Vertex> vIter = graph.command(
				new OSQLSynchQuery<Vertex>("select from " + v1.getId()))
				.execute();

		for (Vertex v : vIter) {
			for (Edge e : v.getEdges(Direction.BOTH)) {
				System.out.println("E " + e);
			}
		}

	}
}