bug 8009: return null instead of exception when the vm is stuck in STARTING

status 8009: resolved fixed

server/src/com/cloud/vm/UserVmManagerImpl.java

@@ -1888,7 +1888,8 @@ public class UserVmManagerImpl implements UserVmManager, UserVmService, Manager
         if (status) {
         	return _vmDao.findById(vmId);
         } else {
-        	throw new CloudRuntimeException("Failed to reboot vm with id: " + vmId);
+        	s_logger.warn("Failed to reboot vm with id: " + vmId);
+        	return null;
         }
 	}