http://git-wip-us.apache.org/repos/asf/flink/blob/6e40f590/flink-runtime/src/test/java/org/apache/flink/runtime/jobmanager/scheduler/SchedulerSlotSharingTest.java
----------------------------------------------------------------------
diff --git 
a/flink-runtime/src/test/java/org/apache/flink/runtime/jobmanager/scheduler/SchedulerSlotSharingTest.java
 
b/flink-runtime/src/test/java/org/apache/flink/runtime/jobmanager/scheduler/SchedulerSlotSharingTest.java
index fd0523b..c4121f6 100644
--- 
a/flink-runtime/src/test/java/org/apache/flink/runtime/jobmanager/scheduler/SchedulerSlotSharingTest.java
+++ 
b/flink-runtime/src/test/java/org/apache/flink/runtime/jobmanager/scheduler/SchedulerSlotSharingTest.java
@@ -62,10 +62,10 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(i2);
                        
                        // schedule 4 tasks from the first vertex group
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 8), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 8), sharingGroup));
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 8), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 8), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 8), sharingGroup), false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 8), sharingGroup), false).get();
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 8), sharingGroup), false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 8), sharingGroup), false).get();
                        
                        assertNotNull(s1);
                        assertNotNull(s2);
@@ -76,7 +76,7 @@ public class SchedulerSlotSharingTest {
                        
                        // we cannot schedule another task from the first 
vertex group
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 4, 8), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 4, 8), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -90,7 +90,7 @@ public class SchedulerSlotSharingTest {
                        s3.releaseSlot();
                        
                        // allocate another slot from that group
-                       SimpleSlot s5 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 4, 8), sharingGroup));
+                       SimpleSlot s5 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 4, 8), sharingGroup), false).get();
                        assertNotNull(s5);
                        
                        // release all old slots
@@ -98,9 +98,9 @@ public class SchedulerSlotSharingTest {
                        s2.releaseSlot();
                        s4.releaseSlot();
                        
-                       SimpleSlot s6 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 5, 8), sharingGroup));
-                       SimpleSlot s7 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 6, 8), sharingGroup));
-                       SimpleSlot s8 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 7, 8), sharingGroup));
+                       SimpleSlot s6 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 5, 8), sharingGroup), false).get();
+                       SimpleSlot s7 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 6, 8), sharingGroup), false).get();
+                       SimpleSlot s8 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 7, 8), sharingGroup), false).get();
                        
                        assertNotNull(s6);
                        assertNotNull(s7);
@@ -135,7 +135,7 @@ public class SchedulerSlotSharingTest {
        }
        
        @Test
-       public void scheduleImmediatelyWithSharing() {
+       public void allocateSlotWithSharing() {
                try {
                        JobVertexID jid1 = new JobVertexID();
                        JobVertexID jid2 = new JobVertexID();
@@ -147,10 +147,10 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(2));
                        
                        // schedule 4 tasks from the first vertex group
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 5), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 5), sharingGroup));
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 5), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 5), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 5), sharingGroup), false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 5), sharingGroup), false).get();
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 5), sharingGroup), false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 5), sharingGroup), false).get();
                        
                        assertNotNull(s1);
                        assertNotNull(s2);
@@ -161,7 +161,7 @@ public class SchedulerSlotSharingTest {
                        
                        // we cannot schedule another task from the first 
vertex group
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -172,10 +172,10 @@ public class SchedulerSlotSharingTest {
                        }
                        
                        // schedule some tasks from the second ID group
-                       SimpleSlot s1_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 5), sharingGroup));
-                       SimpleSlot s2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 5), sharingGroup));
-                       SimpleSlot s3_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 5), sharingGroup));
-                       SimpleSlot s4_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 3, 5), sharingGroup));
+                       SimpleSlot s1_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 5), sharingGroup), false).get();
+                       SimpleSlot s2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 5), sharingGroup), false).get();
+                       SimpleSlot s3_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 5), sharingGroup), false).get();
+                       SimpleSlot s4_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 3, 5), sharingGroup), false).get();
                        
                        assertNotNull(s1_2);
                        assertNotNull(s2_2);
@@ -184,7 +184,7 @@ public class SchedulerSlotSharingTest {
                        
                        // we cannot schedule another task from the second 
vertex group
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -205,7 +205,7 @@ public class SchedulerSlotSharingTest {
                        
                        // we can still not schedule anything from the second 
group of vertices
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -216,7 +216,7 @@ public class SchedulerSlotSharingTest {
                        }
                        
                        // we can schedule something from the first vertex group
-                       SimpleSlot s5 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup));
+                       SimpleSlot s5 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup), false).get();
                        assertNotNull(s5);
                        
                        assertEquals(4, 
sharingGroup.getTaskAssignment().getNumberOfSlots());
@@ -226,7 +226,7 @@ public class SchedulerSlotSharingTest {
                        
                        // now we release a slot from the second vertex group 
and schedule another task from that group
                        s2_2.releaseSlot();
-                       SimpleSlot s5_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup));
+                       SimpleSlot s5_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 4, 5), sharingGroup), false).get();
                        assertNotNull(s5_2);
                        
                        // release all slots
@@ -255,7 +255,7 @@ public class SchedulerSlotSharingTest {
        }
        
        @Test
-       public void 
scheduleImmediatelyWithIntermediateTotallyEmptySharingGroup() {
+       public void allocateSlotWithIntermediateTotallyEmptySharingGroup() {
                try {
                        JobVertexID jid1 = new JobVertexID();
                        JobVertexID jid2 = new JobVertexID();
@@ -267,10 +267,10 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(2));
                        
                        // schedule 4 tasks from the first vertex group
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup));
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup), false).get();
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup), false).get();
                        
                        assertEquals(4, 
sharingGroup.getTaskAssignment().getNumberOfSlots());
                        assertEquals(0, 
sharingGroup.getTaskAssignment().getNumberOfAvailableSlotsForGroup(jid1));
@@ -286,10 +286,10 @@ public class SchedulerSlotSharingTest {
                        assertEquals(0, 
sharingGroup.getTaskAssignment().getNumberOfAvailableSlotsForGroup(jid2));
                        
                        // schedule some tasks from the second ID group
-                       SimpleSlot s1_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup));
-                       SimpleSlot s2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup));
-                       SimpleSlot s3_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup));
-                       SimpleSlot s4_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup));
+                       SimpleSlot s1_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup), false).get();
+                       SimpleSlot s3_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s4_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup), false).get();
 
                        assertEquals(4, 
sharingGroup.getTaskAssignment().getNumberOfSlots());
                        assertEquals(4, 
sharingGroup.getTaskAssignment().getNumberOfAvailableSlotsForGroup(jid1));
@@ -319,7 +319,7 @@ public class SchedulerSlotSharingTest {
        }
        
        @Test
-       public void scheduleImmediatelyWithTemprarilyEmptyVertexGroup() {
+       public void allocateSlotWithTemprarilyEmptyVertexGroup() {
                try {
                        JobVertexID jid1 = new JobVertexID();
                        JobVertexID jid2 = new JobVertexID();
@@ -332,10 +332,10 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(2));
                        
                        // schedule 4 tasks from the first vertex group
-                       SimpleSlot s1_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup));
-                       SimpleSlot s2_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup));
-                       SimpleSlot s3_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup));
-                       SimpleSlot s4_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup));
+                       SimpleSlot s1_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s2_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup), false).get();
+                       SimpleSlot s3_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s4_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup), false).get();
                        
                        assertNotNull(s1_1);
                        assertNotNull(s2_1);
@@ -345,10 +345,10 @@ public class SchedulerSlotSharingTest {
                        assertTrue(areAllDistinct(s1_1, s2_1, s3_1, s4_1));
                        
                        // schedule 4 tasks from the second vertex group
-                       SimpleSlot s1_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 7), sharingGroup));
-                       SimpleSlot s2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 7), sharingGroup));
-                       SimpleSlot s3_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 7), sharingGroup));
-                       SimpleSlot s4_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 3, 7), sharingGroup));
+                       SimpleSlot s1_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 7), sharingGroup), false).get();
+                       SimpleSlot s2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 7), sharingGroup), false).get();
+                       SimpleSlot s3_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 7), sharingGroup), false).get();
+                       SimpleSlot s4_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 3, 7), sharingGroup), false).get();
                        
                        assertNotNull(s1_2);
                        assertNotNull(s2_2);
@@ -358,10 +358,10 @@ public class SchedulerSlotSharingTest {
                        assertTrue(areAllDistinct(s1_2, s2_2, s3_2, s4_2));
                        
                        // schedule 4 tasks from the third vertex group
-                       SimpleSlot s1_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 0, 4), sharingGroup));
-                       SimpleSlot s2_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 1, 4), sharingGroup));
-                       SimpleSlot s3_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 2, 4), sharingGroup));
-                       SimpleSlot s4_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 3, 4), sharingGroup));
+                       SimpleSlot s1_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s2_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 1, 4), sharingGroup), false).get();
+                       SimpleSlot s3_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s4_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 3, 4), sharingGroup), false).get();
                        
                        assertNotNull(s1_3);
                        assertNotNull(s2_3);
@@ -373,7 +373,7 @@ public class SchedulerSlotSharingTest {
                        
                        // we cannot schedule another task from the second 
vertex group
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 4, 5), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -389,9 +389,9 @@ public class SchedulerSlotSharingTest {
                        s3_2.releaseSlot();
                        s4_2.releaseSlot();
                        
-                       SimpleSlot s5_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 5, 7), sharingGroup));
-                       SimpleSlot s6_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 6, 7), sharingGroup));
-                       SimpleSlot s7_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 7, 7), sharingGroup));
+                       SimpleSlot s5_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 5, 7), sharingGroup), false).get();
+                       SimpleSlot s6_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 6, 7), sharingGroup), false).get();
+                       SimpleSlot s7_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 7, 7), sharingGroup), false).get();
                        
                        assertNotNull(s5_2);
                        assertNotNull(s6_2);
@@ -430,7 +430,7 @@ public class SchedulerSlotSharingTest {
        }
        
        @Test
-       public void scheduleImmediatelyWithTemprarilyEmptyVertexGroup2() {
+       public void allocateSlotWithTemporarilyEmptyVertexGroup2() {
                try {
                        JobVertexID jid1 = new JobVertexID();
                        JobVertexID jid2 = new JobVertexID();
@@ -442,9 +442,9 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(2));
                        
                        // schedule 1 tasks from the first vertex group and 2 
from the second
-                       SimpleSlot s1_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 2), sharingGroup));
-                       SimpleSlot s2_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 2), sharingGroup));
-                       SimpleSlot s2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 2), sharingGroup));
+                       SimpleSlot s1_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 2), sharingGroup), false).get();
+                       SimpleSlot s2_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 2), sharingGroup), false).get();
+                       SimpleSlot s2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 2), sharingGroup), false).get();
                        
                        assertNotNull(s1_1);
                        assertNotNull(s2_1);
@@ -460,7 +460,7 @@ public class SchedulerSlotSharingTest {
                        
                        
                        // this should free one slot so we can allocate one 
non-shared
-                       SimpleSlot sx = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 0, 1)));
+                       SimpleSlot sx = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 0, 1)), false).get();
                        assertNotNull(sx);
                        
                        assertEquals(1, 
sharingGroup.getTaskAssignment().getNumberOfSlots());
@@ -495,28 +495,28 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(2));
                        
                        // schedule some individual vertices
-                       SimpleSlot sA1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidA, 0, 2)));
-                       SimpleSlot sA2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidA, 1, 2)));
+                       SimpleSlot sA1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidA, 0, 2)), false).get();
+                       SimpleSlot sA2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidA, 1, 2)), false).get();
                        assertNotNull(sA1);
                        assertNotNull(sA2);
                        
                        // schedule some vertices in the sharing group
-                       SimpleSlot s1_0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup));
-                       SimpleSlot s1_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup));
-                       SimpleSlot s2_0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup));
-                       SimpleSlot s2_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup));
+                       SimpleSlot s1_0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s1_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup), false).get();
+                       SimpleSlot s2_0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s2_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup), false).get();
                        assertNotNull(s1_0);
                        assertNotNull(s1_1);
                        assertNotNull(s2_0);
                        assertNotNull(s2_1);
                        
                        // schedule another isolated vertex
-                       SimpleSlot sB1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidB, 1, 3)));
+                       SimpleSlot sB1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidB, 1, 3)), false).get();
                        assertNotNull(sB1);
                        
                        // should not be able to schedule more vertices
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -527,7 +527,7 @@ public class SchedulerSlotSharingTest {
                        }
                        
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup), false).get();
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -538,7 +538,7 @@ public class SchedulerSlotSharingTest {
                        }
                        
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidB, 0, 3)));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidB, 0, 3)), false);
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -549,7 +549,7 @@ public class SchedulerSlotSharingTest {
                        }
                        
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidC, 0, 1)));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidC, 0, 1)), false);
                                fail("Scheduler accepted too many tasks at the 
same time");
                        }
                        catch (NoResourceAvailableException e) {
@@ -562,8 +562,8 @@ public class SchedulerSlotSharingTest {
                        // release some isolated task and check that the 
sharing group may grow
                        sA1.releaseSlot();
                        
-                       SimpleSlot s1_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup));
-                       SimpleSlot s2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup));
+                       SimpleSlot s1_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup), false).get();
                        assertNotNull(s1_2);
                        assertNotNull(s2_2);
                        
@@ -575,19 +575,19 @@ public class SchedulerSlotSharingTest {
                        assertEquals(1, scheduler.getNumberOfAvailableSlots());
                        
                        // schedule one more no-shared task
-                       SimpleSlot sB0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidB, 0, 3)));
+                       SimpleSlot sB0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidB, 0, 3)), false).get();
                        assertNotNull(sB0);
                        
                        // release the last of the original shared slots and 
allocate one more non-shared slot
                        s2_1.releaseSlot();
-                       SimpleSlot sB2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidB, 2, 3)));
+                       SimpleSlot sB2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidB, 2, 3)), false).get();
                        assertNotNull(sB2);
                        
                        
                        // release on non-shared and add some shared slots
                        sA2.releaseSlot();
-                       SimpleSlot s1_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup));
-                       SimpleSlot s2_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup));
+                       SimpleSlot s1_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup), false).get();
+                       SimpleSlot s2_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup), false).get();
                        assertNotNull(s1_3);
                        assertNotNull(s2_3);
                        
@@ -597,8 +597,8 @@ public class SchedulerSlotSharingTest {
                        s1_3.releaseSlot();
                        s2_3.releaseSlot();
                        
-                       SimpleSlot sC0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidC, 1, 2)));
-                       SimpleSlot sC1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jidC, 0, 2)));
+                       SimpleSlot sC0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidC, 1, 2)), false).get();
+                       SimpleSlot sC1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jidC, 0, 2)), false).get();
                        assertNotNull(sC0);
                        assertNotNull(sC1);
                        
@@ -646,8 +646,8 @@ public class SchedulerSlotSharingTest {
                        
                        
                        // schedule one to each instance
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc2), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc2), sharingGroup), 
false).get();
                        assertNotNull(s1);
                        assertNotNull(s2);
                        
@@ -656,8 +656,8 @@ public class SchedulerSlotSharingTest {
                        assertEquals(1, i2.getNumberOfAvailableSlots());
                        
                        // schedule one from the other group to each instance
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 2, loc1), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 2, loc2), sharingGroup));
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 2, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 2, loc2), sharingGroup), 
false).get();
                        assertNotNull(s3);
                        assertNotNull(s4);
                        
@@ -699,8 +699,8 @@ public class SchedulerSlotSharingTest {
                        
                        
                        // schedule one to each instance
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc1), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc1), sharingGroup), 
false).get();
                        assertNotNull(s1);
                        assertNotNull(s2);
                        
@@ -709,8 +709,8 @@ public class SchedulerSlotSharingTest {
                        assertEquals(2, i2.getNumberOfAvailableSlots());
                        
                        // schedule one from the other group to each instance
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 2, loc2), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 2, loc2), sharingGroup));
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 2, loc2), sharingGroup), 
false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 2, loc2), sharingGroup), 
false).get();
                        assertNotNull(s3);
                        assertNotNull(s4);
                        
@@ -750,14 +750,14 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(i2);
                        
                        // schedule until the one instance is full
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc1), sharingGroup));
-                       SimpleSlot s3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 4, loc1), sharingGroup));
-                       SimpleSlot s4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 4, loc1), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 0, 2, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid1, 1, 2, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 0, 4, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 1, 4, loc1), sharingGroup), 
false).get();
 
                        // schedule two more with preference of same instance 
--> need to go to other instance
-                       SimpleSlot s5 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 3, 4, loc1), sharingGroup));
-                       SimpleSlot s6 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 4, 4, loc1), sharingGroup));
+                       SimpleSlot s5 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 3, 4, loc1), sharingGroup), 
false).get();
+                       SimpleSlot s6 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertexWithLocation(jid2, 4, 4, loc1), sharingGroup), 
false).get();
                        
                        assertNotNull(s1);
                        assertNotNull(s2);
@@ -803,19 +803,19 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(4));
                        
                        // allocate something from group 1 and 2 interleaved 
with schedule for group 3
-                       SimpleSlot slot_1_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup));
-                       SimpleSlot slot_1_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup));
+                       SimpleSlot slot_1_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 4), sharingGroup), false).get();
+                       SimpleSlot slot_1_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 1, 4), sharingGroup), false).get();
 
-                       SimpleSlot slot_2_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup));
-                       SimpleSlot slot_2_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup));
+                       SimpleSlot slot_2_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 4), sharingGroup), false).get();
+                       SimpleSlot slot_2_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 1, 4), sharingGroup), false).get();
                        
-                       SimpleSlot slot_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 0, 1), sharingGroup));
+                       SimpleSlot slot_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 0, 1), sharingGroup), false).get();
                        
-                       SimpleSlot slot_1_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup));
-                       SimpleSlot slot_1_4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup));
+                       SimpleSlot slot_1_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 2, 4), sharingGroup), false).get();
+                       SimpleSlot slot_1_4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 3, 4), sharingGroup), false).get();
                        
-                       SimpleSlot slot_2_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup));
-                       SimpleSlot slot_2_4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup));
+                       SimpleSlot slot_2_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 2, 4), sharingGroup), false).get();
+                       SimpleSlot slot_2_4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 3, 4), sharingGroup), false).get();
                        
                        // release groups 1 and 2
                        
@@ -831,10 +831,10 @@ public class SchedulerSlotSharingTest {
                        
                        // allocate group 4
                        
-                       SimpleSlot slot_4_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 0, 4), sharingGroup));
-                       SimpleSlot slot_4_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 1, 4), sharingGroup));
-                       SimpleSlot slot_4_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 2, 4), sharingGroup));
-                       SimpleSlot slot_4_4 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 3, 4), sharingGroup));
+                       SimpleSlot slot_4_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 0, 4), sharingGroup), false).get();
+                       SimpleSlot slot_4_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 1, 4), sharingGroup), false).get();
+                       SimpleSlot slot_4_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 2, 4), sharingGroup), false).get();
+                       SimpleSlot slot_4_4 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 3, 4), sharingGroup), false).get();
                        
                        // release groups 3 and 4
                        
@@ -885,7 +885,7 @@ public class SchedulerSlotSharingTest {
                                        @Override
                                        public void run() {
                                                try {
-                                                       SimpleSlot slot = 
scheduler.scheduleImmediately(new ScheduledUnit(getTestVertex(jid4, 
enumerator4.getAndIncrement(), 4), sharingGroup));
+                                                       SimpleSlot slot = 
scheduler.allocateSlot(new ScheduledUnit(getTestVertex(jid4, 
enumerator4.getAndIncrement(), 4), sharingGroup), false).get();
 
                                                        
sleepUninterruptibly(rnd.nextInt(5));
                                                        slot.releaseSlot();
@@ -908,7 +908,7 @@ public class SchedulerSlotSharingTest {
                                        public void run() {
                                                try {
                                                        if 
(flag3.compareAndSet(false, true)) {
-                                                               SimpleSlot slot 
= scheduler.scheduleImmediately(new ScheduledUnit(getTestVertex(jid3, 0, 1), 
sharingGroup));
+                                                               SimpleSlot slot 
= scheduler.allocateSlot(new ScheduledUnit(getTestVertex(jid3, 0, 1), 
sharingGroup), false).get();
                                                                
                                                                
sleepUninterruptibly(5);
                                                                
@@ -937,7 +937,7 @@ public class SchedulerSlotSharingTest {
                                        @Override
                                        public void run() {
                                                try {
-                                                       SimpleSlot slot = 
scheduler.scheduleImmediately(new ScheduledUnit(getTestVertex(jid2, 
enumerator2.getAndIncrement(), 4), sharingGroup));
+                                                       SimpleSlot slot = 
scheduler.allocateSlot(new ScheduledUnit(getTestVertex(jid2, 
enumerator2.getAndIncrement(), 4), sharingGroup), false).get();
                                                        
                                                        // wait a bit till 
scheduling the successor
                                                        
sleepUninterruptibly(rnd.nextInt(5));
@@ -964,7 +964,7 @@ public class SchedulerSlotSharingTest {
                                        @Override
                                        public void run() {
                                                try {
-                                                       SimpleSlot slot = 
scheduler.scheduleImmediately(new ScheduledUnit(getTestVertex(jid1, 
enumerator1.getAndIncrement(), 4), sharingGroup));
+                                                       SimpleSlot slot = 
scheduler.allocateSlot(new ScheduledUnit(getTestVertex(jid1, 
enumerator1.getAndIncrement(), 4), sharingGroup), false).get();
                                                        
                                                        // wait a bit till 
scheduling the successor
                                                        
sleepUninterruptibly(rnd.nextInt(5));
@@ -1039,27 +1039,27 @@ public class SchedulerSlotSharingTest {
                        scheduler.newInstanceAvailable(getRandomInstance(4));
                        
                        // schedule one task for the first and second vertex
-                       SimpleSlot s1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid1, 0, 1), sharingGroup));
-                       SimpleSlot s2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid2, 0, 1), sharingGroup));
+                       SimpleSlot s1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid1, 0, 1), sharingGroup), false).get();
+                       SimpleSlot s2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid2, 0, 1), sharingGroup), false).get();
                        
                        assertTrue(  s1.getParent() == s2.getParent() );
                        assertEquals(3, scheduler.getNumberOfAvailableSlots());
                        
-                       SimpleSlot s3_0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 0, 5), sharingGroup));
-                       SimpleSlot s3_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 1, 5), sharingGroup));
-                       SimpleSlot s4_0 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 0, 4), sharingGroup));
-                       SimpleSlot s4_1 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 1, 4), sharingGroup));
+                       SimpleSlot s3_0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 0, 5), sharingGroup), false).get();
+                       SimpleSlot s3_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 1, 5), sharingGroup), false).get();
+                       SimpleSlot s4_0 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 0, 4), sharingGroup), false).get();
+                       SimpleSlot s4_1 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 1, 4), sharingGroup), false).get();
                        
                        s1.releaseSlot();
                        s2.releaseSlot();
                        
-                       SimpleSlot s3_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 2, 5), sharingGroup));
-                       SimpleSlot s3_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 3, 5), sharingGroup));
-                       SimpleSlot s4_2 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 2, 4), sharingGroup));
-                       SimpleSlot s4_3 = scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid4, 3, 4), sharingGroup));
+                       SimpleSlot s3_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 2, 5), sharingGroup), false).get();
+                       SimpleSlot s3_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 3, 5), sharingGroup), false).get();
+                       SimpleSlot s4_2 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 2, 4), sharingGroup), false).get();
+                       SimpleSlot s4_3 = scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid4, 3, 4), sharingGroup), false).get();
                        
                        try {
-                               scheduler.scheduleImmediately(new 
ScheduledUnit(getTestVertex(jid3, 4, 5), sharingGroup));
+                               scheduler.allocateSlot(new 
ScheduledUnit(getTestVertex(jid3, 4, 5), sharingGroup), false);
                                fail("should throw an exception");
                        }
                        catch (NoResourceAvailableException e) {

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