Example #1
0
  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());
    }
  }