[UWS] Change phase to ERROR when a JobThread can not be created while starting a job.

 * </ul>

 * 

 * @author	Grégory Mantelet (CDS;ARI)

 * @version	4.1 (10/2014)

 * @version	4.1 (11/2014)

 */

public class UWSJob extends SerializableUWSObject {

	private static final long serialVersionUID = 1L;

		}// Otherwise start directly the execution:

		else{

			// Create its corresponding thread:

			try{

				thread = getFactory().createJobThread(this);

				if (thread == null)

					throw new NullPointerException("Missing job work ! The thread created by the factory is NULL => The job can't be executed !");

			}catch(UWSException ue){

				setPhase(ExecutionPhase.ERROR);

				throw ue;

			}

			// Change the job phase:

			setPhase(ExecutionPhase.EXECUTING);