public void resetForNewExecution() {
if (!(numSubtasksInFinalState == 0 || numSubtasksInFinalState == parallelism)) {
throw new IllegalStateException("Cannot reset vertex that is not in final state");
}
synchronized (stateMonitor) {
// check and reset the sharing groups with scheduler hints
if (slotSharingGroup != null) {
slotSharingGroup.clearTaskAssignment();
}
// reset vertices one by one. if one reset fails, the "vertices in final state"
// fields will be consistent to handle triggered cancel calls
for (int i = 0; i < parallelism; i++) {
taskVertices[i].resetForNewExecution();
if (finishedSubtasks[i]) {
finishedSubtasks[i] = false;
numSubtasksInFinalState--;
}
}
if (numSubtasksInFinalState != 0) {
throw new RuntimeException("Bug: resetting the execution job vertex failed.");
}
// set up the input splits again
try {
if (this.inputSplits != null) {
// lazy assignment
@SuppressWarnings("unchecked")
InputSplitSource<InputSplit> splitSource =
(InputSplitSource<InputSplit>) jobVertex.getInputSplitSource();
this.splitAssigner = splitSource.getInputSplitAssigner(this.inputSplits);
}
} catch (Throwable t) {
throw new RuntimeException(
"Re-creating the input split assigner failed: " + t.getMessage(), t);
}
// Reset intermediate results
for (IntermediateResult result : producedDataSets) {
result.resetForNewExecution();
}
}
}
/*
* Test setup:
* - v1 is isolated, no slot sharing
* - v2 and v3 (not connected) share slots
* - v4 and v5 (connected) share slots
*/
@Test
public void testAssignSlotSharingGroup() {
try {
JobVertex v1 = new JobVertex("v1");
JobVertex v2 = new JobVertex("v2");
JobVertex v3 = new JobVertex("v3");
JobVertex v4 = new JobVertex("v4");
JobVertex v5 = new JobVertex("v5");
v1.setParallelism(4);
v2.setParallelism(5);
v3.setParallelism(7);
v4.setParallelism(1);
v5.setParallelism(11);
v2.connectNewDataSetAsInput(v1, DistributionPattern.POINTWISE);
v5.connectNewDataSetAsInput(v4, DistributionPattern.POINTWISE);
SlotSharingGroup jg1 = new SlotSharingGroup();
v2.setSlotSharingGroup(jg1);
v3.setSlotSharingGroup(jg1);
SlotSharingGroup jg2 = new SlotSharingGroup();
v4.setSlotSharingGroup(jg2);
v5.setSlotSharingGroup(jg2);
List<JobVertex> vertices = new ArrayList<JobVertex>(Arrays.asList(v1, v2, v3, v4, v5));
ExecutionGraph eg =
new ExecutionGraph(
TestingUtils.defaultExecutionContext(),
new JobID(),
"test job",
new Configuration(),
ExecutionConfigTest.getSerializedConfig(),
AkkaUtils.getDefaultTimeout(),
new NoRestartStrategy());
eg.attachJobGraph(vertices);
// verify that the vertices are all in the same slot sharing group
SlotSharingGroup group1 = null;
SlotSharingGroup group2 = null;
// verify that v1 tasks have no slot sharing group
assertNull(eg.getJobVertex(v1.getID()).getSlotSharingGroup());
// v2 and v3 are shared
group1 = eg.getJobVertex(v2.getID()).getSlotSharingGroup();
assertNotNull(group1);
assertEquals(group1, eg.getJobVertex(v3.getID()).getSlotSharingGroup());
assertEquals(2, group1.getJobVertexIds().size());
assertTrue(group1.getJobVertexIds().contains(v2.getID()));
assertTrue(group1.getJobVertexIds().contains(v3.getID()));
// v4 and v5 are shared
group2 = eg.getJobVertex(v4.getID()).getSlotSharingGroup();
assertNotNull(group2);
assertEquals(group2, eg.getJobVertex(v5.getID()).getSlotSharingGroup());
assertEquals(2, group1.getJobVertexIds().size());
assertTrue(group2.getJobVertexIds().contains(v4.getID()));
assertTrue(group2.getJobVertexIds().contains(v5.getID()));
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}