| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.mapreduce.task.reduce; |
| |
| import static org.mockito.Mockito.any; |
| import static org.mockito.Mockito.anyInt; |
| import static org.mockito.Mockito.anyString; |
| import static org.mockito.Mockito.eq; |
| import static org.mockito.Mockito.inOrder; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.never; |
| import static org.mockito.Mockito.times; |
| import static org.mockito.Mockito.verify; |
| import static org.mockito.Mockito.when; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| |
| import org.apache.hadoop.mapred.JobID; |
| import org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate; |
| import org.apache.hadoop.mapred.TaskAttemptID; |
| import org.apache.hadoop.mapred.TaskCompletionEvent; |
| import org.apache.hadoop.mapred.TaskUmbilicalProtocol; |
| import org.apache.hadoop.mapreduce.TaskType; |
| import org.junit.Test; |
| import org.mockito.InOrder; |
| |
| public class TestEventFetcher { |
| |
| @Test |
| public void testConsecutiveFetch() throws IOException { |
| final int MAX_EVENTS_TO_FETCH = 100; |
| TaskAttemptID tid = new TaskAttemptID("12345", 1, TaskType.REDUCE, 1, 1); |
| |
| TaskUmbilicalProtocol umbilical = mock(TaskUmbilicalProtocol.class); |
| when(umbilical.getMapCompletionEvents(any(JobID.class), |
| anyInt(), anyInt(), any(TaskAttemptID.class))) |
| .thenReturn(getMockedCompletionEventsUpdate(0, 0)); |
| when(umbilical.getMapCompletionEvents(any(JobID.class), |
| eq(0), eq(MAX_EVENTS_TO_FETCH), eq(tid))) |
| .thenReturn(getMockedCompletionEventsUpdate(0, MAX_EVENTS_TO_FETCH)); |
| when(umbilical.getMapCompletionEvents(any(JobID.class), |
| eq(MAX_EVENTS_TO_FETCH), eq(MAX_EVENTS_TO_FETCH), eq(tid))) |
| .thenReturn(getMockedCompletionEventsUpdate(MAX_EVENTS_TO_FETCH, |
| MAX_EVENTS_TO_FETCH)); |
| when(umbilical.getMapCompletionEvents(any(JobID.class), |
| eq(MAX_EVENTS_TO_FETCH*2), eq(MAX_EVENTS_TO_FETCH), eq(tid))) |
| .thenReturn(getMockedCompletionEventsUpdate(MAX_EVENTS_TO_FETCH*2, 3)); |
| |
| @SuppressWarnings("unchecked") |
| ShuffleScheduler<String,String> scheduler = mock(ShuffleScheduler.class); |
| ExceptionReporter reporter = mock(ExceptionReporter.class); |
| |
| EventFetcherForTest<String,String> ef = |
| new EventFetcherForTest<String,String>(tid, umbilical, scheduler, |
| reporter, MAX_EVENTS_TO_FETCH); |
| ef.getMapCompletionEvents(); |
| |
| verify(reporter, never()).reportException(any(Throwable.class)); |
| InOrder inOrder = inOrder(umbilical); |
| inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class), |
| eq(0), eq(MAX_EVENTS_TO_FETCH), eq(tid)); |
| inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class), |
| eq(MAX_EVENTS_TO_FETCH), eq(MAX_EVENTS_TO_FETCH), eq(tid)); |
| inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class), |
| eq(MAX_EVENTS_TO_FETCH*2), eq(MAX_EVENTS_TO_FETCH), eq(tid)); |
| verify(scheduler, times(MAX_EVENTS_TO_FETCH*2 + 3)).addKnownMapOutput( |
| anyString(), anyString(), any(TaskAttemptID.class)); |
| } |
| |
| private MapTaskCompletionEventsUpdate getMockedCompletionEventsUpdate( |
| int startIdx, int numEvents) { |
| ArrayList<TaskCompletionEvent> tceList = |
| new ArrayList<TaskCompletionEvent>(numEvents); |
| for (int i = 0; i < numEvents; ++i) { |
| int eventIdx = startIdx + i; |
| TaskCompletionEvent tce = new TaskCompletionEvent(eventIdx, |
| new TaskAttemptID("12345", 1, TaskType.MAP, eventIdx, 0), |
| eventIdx, true, TaskCompletionEvent.Status.SUCCEEDED, |
| "http://somehost:8888"); |
| tceList.add(tce); |
| } |
| TaskCompletionEvent[] events = {}; |
| return new MapTaskCompletionEventsUpdate(tceList.toArray(events), false); |
| } |
| |
| private static class EventFetcherForTest<K,V> extends EventFetcher<K,V> { |
| |
| public EventFetcherForTest(TaskAttemptID reduce, |
| TaskUmbilicalProtocol umbilical, ShuffleScheduler<K,V> scheduler, |
| ExceptionReporter reporter, int maxEventsToFetch) { |
| super(reduce, umbilical, scheduler, reporter, maxEventsToFetch); |
| } |
| |
| @Override |
| public int getMapCompletionEvents() throws IOException { |
| return super.getMapCompletionEvents(); |
| } |
| |
| } |
| } |