MAPREDUCE-4972. Coverage fixing for org.apache.hadoop.mapreduce.jobhistory (Aleksey Gorshkov via bobby)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1458906 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -786,6 +786,9 @@ Release 0.23.7 - UNRELEASED
     MAPREDUCE-5027. Shuffle does not limit number of outstanding connections
     (Robert Parker via jeagles)
 
+    MAPREDUCE-4972. Coverage fixing for org.apache.hadoop.mapreduce.jobhistory
+    (Aleksey Gorshkov via bobby)
+
   OPTIMIZATIONS
 
     MAPREDUCE-4946. Fix a performance problem for large jobs by reducing the

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/jobhistory/TestEvents.java

@@ -0,0 +1,397 @@
+/**
+ * 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.jobhistory;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import static junit.framework.Assert.*;
+
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.mapred.JobPriority;
+import org.apache.hadoop.mapreduce.Counters;
+import org.apache.hadoop.mapreduce.JobID;
+import org.apache.hadoop.mapreduce.TaskAttemptID;
+import org.apache.hadoop.mapreduce.TaskID;
+import org.apache.hadoop.mapreduce.TaskType;
+import org.junit.Test;
+
+public class TestEvents {
+
+  /**
+   * test a getters of TaskAttemptFinishedEvent and TaskAttemptFinished
+   * 
+   * @throws Exception
+   */
+  @Test(timeout = 10000)
+  public void testTaskAttemptFinishedEvent() throws Exception {
+
+    JobID jid = new JobID("001", 1);
+    TaskID tid = new TaskID(jid, TaskType.REDUCE, 2);
+    TaskAttemptID taskAttemptId = new TaskAttemptID(tid, 3);
+    Counters counters = new Counters();
+    TaskAttemptFinishedEvent test = new TaskAttemptFinishedEvent(taskAttemptId,
+        TaskType.REDUCE, "TEST", 123L, "RAKNAME", "HOSTNAME", "STATUS",
+        counters);
+    assertEquals(test.getAttemptId().toString(), taskAttemptId.toString());
+
+    assertEquals(test.getCounters(), counters);
+    assertEquals(test.getFinishTime(), 123L);
+    assertEquals(test.getHostname(), "HOSTNAME");
+    assertEquals(test.getRackName(), "RAKNAME");
+    assertEquals(test.getState(), "STATUS");
+    assertEquals(test.getTaskId(), tid);
+    assertEquals(test.getTaskStatus(), "TEST");
+    assertEquals(test.getTaskType(), TaskType.REDUCE);
+
+  }
+
+  /**
+   * simple test JobPriorityChangeEvent and JobPriorityChange
+   * 
+   * @throws Exception
+   */
+
+  @Test(timeout = 10000)
+  public void testJobPriorityChange() throws Exception {
+    org.apache.hadoop.mapreduce.JobID jid = new JobID("001", 1);
+    JobPriorityChangeEvent test = new JobPriorityChangeEvent(jid,
+        JobPriority.LOW);
+    assertEquals(test.getJobId().toString(), jid.toString());
+    assertEquals(test.getPriority(), JobPriority.LOW);
+
+  }
+
+  /**
+   * simple test TaskUpdatedEvent and TaskUpdated
+   * 
+   * @throws Exception
+   */
+  @Test(timeout = 10000)
+  public void testTaskUpdated() throws Exception {
+    JobID jid = new JobID("001", 1);
+    TaskID tid = new TaskID(jid, TaskType.REDUCE, 2);
+    TaskUpdatedEvent test = new TaskUpdatedEvent(tid, 1234L);
+    assertEquals(test.getTaskId().toString(), tid.toString());
+    assertEquals(test.getFinishTime(), 1234L);
+
+  }
+
+  /*
+   * test EventReader EventReader should read the list of events and return
+   * instance of HistoryEvent Different HistoryEvent should have a different
+   * datum.
+   */
+  @Test(timeout = 10000)
+  public void testEvents() throws Exception {
+
+    EventReader reader = new EventReader(new DataInputStream(
+        new ByteArrayInputStream(getEvents())));
+    HistoryEvent e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.JOB_PRIORITY_CHANGED));
+    assertEquals("ID", ((JobPriorityChange) e.getDatum()).jobid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.JOB_STATUS_CHANGED));
+    assertEquals("ID", ((JobStatusChanged) e.getDatum()).jobid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.TASK_UPDATED));
+    assertEquals("ID", ((TaskUpdated) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_KILLED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptUnsuccessfulCompletion) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.JOB_KILLED));
+    assertEquals("ID",
+        ((JobUnsuccessfulCompletion) e.getDatum()).jobid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_STARTED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptStarted) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_FINISHED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptFinished) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_KILLED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptUnsuccessfulCompletion) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_KILLED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptUnsuccessfulCompletion) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_STARTED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptStarted) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_FINISHED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptFinished) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_KILLED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptUnsuccessfulCompletion) e.getDatum()).taskid.toString());
+
+    e = reader.getNextEvent();
+    assertTrue(e.getEventType().equals(EventType.REDUCE_ATTEMPT_KILLED));
+    assertEquals("task_1_2_r03_4",
+        ((TaskAttemptUnsuccessfulCompletion) e.getDatum()).taskid.toString());
+
+    reader.close();
+  }
+
+  /*
+   * makes array of bytes with History events
+   */
+  private byte[] getEvents() throws Exception {
+    ByteArrayOutputStream output = new ByteArrayOutputStream();
+    FSDataOutputStream fsOutput = new FSDataOutputStream(output,
+        new FileSystem.Statistics("scheme"));
+    EventWriter writer = new EventWriter(fsOutput);
+    writer.write(getJobPriorityChangedEvent());
+    writer.write(getJobStatusChangedEvent());
+    writer.write(getTaskUpdatedEvent());
+    writer.write(getReduceAttemptKilledEvent());
+    writer.write(getJobKilledEvent());
+    writer.write(getSetupAttemptStartedEvent());
+    writer.write(getTaskAttemptFinishedEvent());
+    writer.write(getSetupAttemptFieledEvent());
+    writer.write(getSetupAttemptKilledEvent());
+    writer.write(getCleanupAttemptStartedEvent());
+    writer.write(getCleanupAttemptFinishedEvent());
+    writer.write(getCleanupAttemptFiledEvent());
+    writer.write(getCleanupAttemptKilledEvent());
+
+    writer.flush();
+    writer.close();
+
+    return output.toByteArray();
+  }
+
+  private FakeEvent getCleanupAttemptKilledEvent() {
+    FakeEvent result = new FakeEvent(EventType.CLEANUP_ATTEMPT_KILLED);
+
+    result.setDatum(getTaskAttemptUnsuccessfulCompletion());
+    return result;
+  }
+
+  private FakeEvent getCleanupAttemptFiledEvent() {
+    FakeEvent result = new FakeEvent(EventType.CLEANUP_ATTEMPT_FAILED);
+
+    result.setDatum(getTaskAttemptUnsuccessfulCompletion());
+    return result;
+  }
+
+  private TaskAttemptUnsuccessfulCompletion getTaskAttemptUnsuccessfulCompletion() {
+    TaskAttemptUnsuccessfulCompletion datum = new TaskAttemptUnsuccessfulCompletion();
+    datum.attemptId = "attempt_1_2_r3_4_5";
+    datum.clockSplits = Arrays.asList(1, 2, 3);
+    datum.cpuUsages = Arrays.asList(100, 200, 300);
+    datum.error = "Error";
+    datum.finishTime = 2;
+    datum.hostname = "hostname";
+    datum.rackname = "rackname";
+    datum.physMemKbytes = Arrays.asList(1000, 2000, 3000);
+    datum.taskid = "task_1_2_r03_4";
+    datum.port = 1000;
+    datum.taskType = "REDUCE";
+    datum.status = "STATUS";
+    datum.counters = getCounters();
+    datum.vMemKbytes = Arrays.asList(1000, 2000, 3000);
+    return datum;
+  }
+
+  private JhCounters getCounters() {
+    JhCounters counters = new JhCounters();
+    counters.groups = new ArrayList<JhCounterGroup>(0);
+    counters.name = "name";
+    return counters;
+  }
+
+  private FakeEvent getCleanupAttemptFinishedEvent() {
+    FakeEvent result = new FakeEvent(EventType.CLEANUP_ATTEMPT_FINISHED);
+    TaskAttemptFinished datum = new TaskAttemptFinished();
+    datum.attemptId = "attempt_1_2_r3_4_5";
+
+    datum.counters = getCounters();
+    datum.finishTime = 2;
+    datum.hostname = "hostname";
+    datum.rackname = "rackName";
+    datum.state = "state";
+    datum.taskid = "task_1_2_r03_4";
+    datum.taskStatus = "taskStatus";
+    datum.taskType = "REDUCE";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getCleanupAttemptStartedEvent() {
+    FakeEvent result = new FakeEvent(EventType.CLEANUP_ATTEMPT_STARTED);
+    TaskAttemptStarted datum = new TaskAttemptStarted();
+
+    datum.attemptId = "attempt_1_2_r3_4_5";
+    datum.avataar = "avatar";
+    datum.containerId = "containerId";
+    datum.httpPort = 10000;
+    datum.locality = "locality";
+    datum.shufflePort = 10001;
+    datum.startTime = 1;
+    datum.taskid = "task_1_2_r03_4";
+    datum.taskType = "taskType";
+    datum.trackerName = "trackerName";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getSetupAttemptKilledEvent() {
+    FakeEvent result = new FakeEvent(EventType.SETUP_ATTEMPT_KILLED);
+    result.setDatum(getTaskAttemptUnsuccessfulCompletion());
+    return result;
+  }
+
+  private FakeEvent getSetupAttemptFieledEvent() {
+    FakeEvent result = new FakeEvent(EventType.SETUP_ATTEMPT_FAILED);
+
+    result.setDatum(getTaskAttemptUnsuccessfulCompletion());
+    return result;
+  }
+
+  private FakeEvent getTaskAttemptFinishedEvent() {
+    FakeEvent result = new FakeEvent(EventType.SETUP_ATTEMPT_FINISHED);
+    TaskAttemptFinished datum = new TaskAttemptFinished();
+
+    datum.attemptId = "attempt_1_2_r3_4_5";
+    datum.counters = getCounters();
+    datum.finishTime = 2;
+    datum.hostname = "hostname";
+    datum.rackname = "rackname";
+    datum.state = "state";
+    datum.taskid = "task_1_2_r03_4";
+    datum.taskStatus = "taskStatus";
+    datum.taskType = "REDUCE";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getSetupAttemptStartedEvent() {
+    FakeEvent result = new FakeEvent(EventType.SETUP_ATTEMPT_STARTED);
+    TaskAttemptStarted datum = new TaskAttemptStarted();
+    datum.attemptId = "ID";
+    datum.avataar = "avataar";
+    datum.containerId = "containerId";
+    datum.httpPort = 10000;
+    datum.locality = "locality";
+    datum.shufflePort = 10001;
+    datum.startTime = 1;
+    datum.taskid = "task_1_2_r03_4";
+    datum.taskType = "taskType";
+    datum.trackerName = "trackerName";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getJobKilledEvent() {
+    FakeEvent result = new FakeEvent(EventType.JOB_KILLED);
+    JobUnsuccessfulCompletion datum = new JobUnsuccessfulCompletion();
+    datum.finishedMaps = 1;
+    datum.finishedReduces = 2;
+    datum.finishTime = 3;
+    datum.jobid = "ID";
+    datum.jobStatus = "STATUS";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getReduceAttemptKilledEvent() {
+    FakeEvent result = new FakeEvent(EventType.REDUCE_ATTEMPT_KILLED);
+
+    result.setDatum(getTaskAttemptUnsuccessfulCompletion());
+    return result;
+  }
+
+  private FakeEvent getJobPriorityChangedEvent() {
+    FakeEvent result = new FakeEvent(EventType.JOB_PRIORITY_CHANGED);
+    JobPriorityChange datum = new JobPriorityChange();
+    datum.jobid = "ID";
+    datum.priority = "priority";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getJobStatusChangedEvent() {
+    FakeEvent result = new FakeEvent(EventType.JOB_STATUS_CHANGED);
+    JobStatusChanged datum = new JobStatusChanged();
+    datum.jobid = "ID";
+    datum.jobStatus = "newStatus";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private FakeEvent getTaskUpdatedEvent() {
+    FakeEvent result = new FakeEvent(EventType.TASK_UPDATED);
+    TaskUpdated datum = new TaskUpdated();
+    datum.finishTime = 2;
+    datum.taskid = "ID";
+    result.setDatum(datum);
+    return result;
+  }
+
+  private class FakeEvent implements HistoryEvent {
+    private EventType eventType;
+    private Object datum;
+
+    public FakeEvent(EventType eventType) {
+      this.eventType = eventType;
+    }
+
+    @Override
+    public EventType getEventType() {
+      return eventType;
+    }
+
+    @Override
+    public Object getDatum() {
+
+      return datum;
+    }
+
+    @Override
+    public void setDatum(Object datum) {
+      this.datum = datum;
+    }
+
+  }
+
+}

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/jobhistory/TestJobHistoryEventHandler.java

@@ -31,6 +31,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileContext;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.mapreduce.Counters;
+import org.apache.hadoop.mapreduce.JobID;
 import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.mapreduce.TaskID;
 import org.apache.hadoop.mapreduce.TaskType;
@@ -53,7 +54,7 @@ public class TestJobHistoryEventHandler {
   private static final Log LOG = LogFactory
       .getLog(TestJobHistoryEventHandler.class);
 
-  @Test
+  @Test (timeout=50000)
   public void testFirstFlushOnCompletionEvent() throws Exception {
     TestParams t = new TestParams();
     Configuration conf = new Configuration();
@@ -96,7 +97,7 @@ public class TestJobHistoryEventHandler {
     }
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testMaxUnflushedCompletionEvents() throws Exception {
     TestParams t = new TestParams();
     Configuration conf = new Configuration();
@@ -141,7 +142,7 @@ public class TestJobHistoryEventHandler {
     }
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testUnflushedTimer() throws Exception {
     TestParams t = new TestParams();
     Configuration conf = new Configuration();
@@ -182,7 +183,7 @@ public class TestJobHistoryEventHandler {
     }
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testBatchedFlushJobEndMultiplier() throws Exception {
     TestParams t = new TestParams();
     Configuration conf = new Configuration();
@@ -279,12 +280,8 @@ public class TestJobHistoryEventHandler {
   }
 
   private JobHistoryEvent getEventToEnqueue(JobId jobId) {
-    JobHistoryEvent toReturn = Mockito.mock(JobHistoryEvent.class);
-    HistoryEvent he = Mockito.mock(HistoryEvent.class);
-    Mockito.when(he.getEventType()).thenReturn(EventType.JOB_STATUS_CHANGED);
-    Mockito.when(toReturn.getHistoryEvent()).thenReturn(he);
-    Mockito.when(toReturn.getJobID()).thenReturn(jobId);
-    return toReturn;
+    HistoryEvent toReturn = new JobStatusChangedEvent(new JobID(Integer.toString(jobId.getId()), jobId.getId()), "change status");
+    return new JobHistoryEvent(jobId, toReturn);
   }
 
   @Test
@@ -344,8 +341,6 @@ public class TestJobHistoryEventHandler {
 class JHEvenHandlerForTest extends JobHistoryEventHandler {
 
   private EventWriter eventWriter;
-  volatile int handleEventCompleteCalls = 0;
-  volatile int handleEventStartedCalls = 0;
 
   public JHEvenHandlerForTest(AppContext context, int startCount) {
     super(context, startCount);
@@ -375,13 +370,12 @@ class JHEvenHandlerForTest extends JobHistoryEventHandler {
  * Class to help with testSigTermedFunctionality
  */
 class JHEventHandlerForSigtermTest extends JobHistoryEventHandler {
-  private MetaInfo metaInfo;
   public JHEventHandlerForSigtermTest(AppContext context, int startCount) {
     super(context, startCount);
   }
 
   public void addToFileMap(JobId jobId) {
-    metaInfo = Mockito.mock(MetaInfo.class);
+    MetaInfo metaInfo = Mockito.mock(MetaInfo.class);
     Mockito.when(metaInfo.isWriterActive()).thenReturn(true);
     fileMap.put(jobId, metaInfo);
   }

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestJobHistoryEntities.java

@@ -79,7 +79,7 @@ public class TestJobHistoryEntities {
   }
 
   /* Verify some expected values based on the history file */
-  @Test
+  @Test (timeout=10000)
   public void testCompletedJob() throws Exception {
     HistoryFileInfo info = mock(HistoryFileInfo.class);
     when(info.getConfFile()).thenReturn(fullConfPath);
@@ -104,7 +104,7 @@ public class TestJobHistoryEntities {
     assertEquals(JobState.SUCCEEDED, jobReport.getJobState());
   }
   
-  @Test
+  @Test (timeout=10000)
   public void testCompletedTask() throws Exception {
     HistoryFileInfo info = mock(HistoryFileInfo.class);
     when(info.getConfFile()).thenReturn(fullConfPath);
@@ -133,7 +133,7 @@ public class TestJobHistoryEntities {
     assertEquals(rt1Id, rt1Report.getTaskId());
   }
   
-  @Test
+  @Test (timeout=10000)
   public void testCompletedTaskAttempt() throws Exception {
     HistoryFileInfo info = mock(HistoryFileInfo.class);
     when(info.getConfFile()).thenReturn(fullConfPath);

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestJobHistoryEvents.java

@@ -25,7 +25,6 @@ import junit.framework.Assert;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.mapreduce.TypeConverter;
 import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEvent;
 import org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler;
@@ -67,8 +66,17 @@ public class TestJobHistoryEvents {
      * completed maps 
     */
     HistoryContext context = new JobHistory();
+    // test start and stop states
     ((JobHistory)context).init(conf);
+    ((JobHistory)context).start();
+    Assert.assertTrue( context.getStartTime()>0);
+    Assert.assertEquals(((JobHistory)context).getServiceState(),Service.STATE.STARTED);
+    
+    
+    ((JobHistory)context).stop();
+    Assert.assertEquals(((JobHistory)context).getServiceState(),Service.STATE.STOPPED);
       Job parsedJob = context.getJob(jobId);
+    
     Assert.assertEquals("CompletedMaps not correct", 2,
         parsedJob.getCompletedMaps());
     Assert.assertEquals(System.getProperty("user.name"), parsedJob.getUserName());
@@ -177,9 +185,8 @@ public class TestJobHistoryEvents {
     @Override
     protected EventHandler<JobHistoryEvent> createJobHistoryHandler(
         AppContext context) {
-      JobHistoryEventHandler eventHandler = new JobHistoryEventHandler(
+      return new JobHistoryEventHandler(
               context, getStartCount());
-      return eventHandler;
     }
   }
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestJobHistoryParsing.java

@@ -18,7 +18,9 @@
 
 package org.apache.hadoop.mapreduce.v2.hs;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.PrintStream;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
@@ -40,6 +42,7 @@ import org.apache.hadoop.mapreduce.TaskID;
 import org.apache.hadoop.mapreduce.TypeConverter;
 import org.apache.hadoop.mapreduce.jobhistory.EventReader;
 import org.apache.hadoop.mapreduce.jobhistory.HistoryEvent;
+import org.apache.hadoop.mapreduce.jobhistory.HistoryViewer;
 import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser;
 import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.AMInfo;
 import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.JobInfo;
@@ -60,7 +63,6 @@ import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEventType;
 import org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.HistoryFileInfo;
 import org.apache.hadoop.mapreduce.v2.hs.TestJobHistoryEvents.MRAppWithHistory;
 import org.apache.hadoop.mapreduce.v2.jobhistory.FileNameIndexUtils;
-import org.apache.hadoop.mapreduce.v2.jobhistory.JHAdminConfig;
 import org.apache.hadoop.mapreduce.v2.jobhistory.JobHistoryUtils;
 import org.apache.hadoop.mapreduce.v2.jobhistory.JobIndexInfo;
 import org.apache.hadoop.net.DNSToSwitchMapping;
@@ -78,6 +80,8 @@ public class TestJobHistoryParsing {
 
   private static final String RACK_NAME = "/MyRackName";
 
+  private  ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+
   public static class MyResolver implements DNSToSwitchMapping {
     @Override
     public List<String> resolve(List<String> names) {
@@ -89,14 +93,14 @@ public class TestJobHistoryParsing {
     }
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testJobInfo() throws Exception {
     JobInfo info = new JobInfo();
     Assert.assertEquals("NORMAL", info.getPriority());
     info.printAll();
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testHistoryParsing() throws Exception {
     LOG.info("STARTING testHistoryParsing()");
     try {
@@ -106,7 +110,7 @@ public class TestJobHistoryParsing {
     }
   }
   
-  @Test
+  @Test (timeout=50000)
   public void testHistoryParsingWithParseErrors() throws Exception {
     LOG.info("STARTING testHistoryParsingWithParseErrors()");
     try {
@@ -321,18 +325,37 @@ public class TestJobHistoryParsing {
         }
       }
     }
+    
+    // test output for HistoryViewer
+    PrintStream stdps=System.out;
+    try {
+      System.setOut(new PrintStream(outContent));
+      HistoryViewer viewer = new HistoryViewer(fc.makeQualified(
+          fileInfo.getHistoryFile()).toString(), conf, true);
+      viewer.print();
+      
+      for (TaskInfo taskInfo : allTasks.values()) { 
+        
+        String test=  (taskInfo.getTaskStatus()==null?"":taskInfo.getTaskStatus())+" "+taskInfo.getTaskType()+" task list for "+taskInfo.getTaskId().getJobID();
+        Assert.assertTrue(outContent.toString().indexOf(test)>0);
+        Assert.assertTrue(outContent.toString().indexOf(taskInfo.getTaskId().toString())>0);
+      }
+    } finally {
+      System.setOut(stdps);
+
+    }
   }
 
   // Computes finished maps similar to RecoveryService...
-  private long computeFinishedMaps(JobInfo jobInfo, 
-      int numMaps, int numSuccessfulMaps) {
+  private long computeFinishedMaps(JobInfo jobInfo, int numMaps,
+      int numSuccessfulMaps) {
     if (numMaps == numSuccessfulMaps) {
       return jobInfo.getFinishedMaps();
     }
 
     long numFinishedMaps = 0;
-    Map<org.apache.hadoop.mapreduce.TaskID, TaskInfo> taskInfos = 
-        jobInfo.getAllTasks();
+    Map<org.apache.hadoop.mapreduce.TaskID, TaskInfo> taskInfos = jobInfo
+        .getAllTasks();
     for (TaskInfo taskInfo : taskInfos.values()) {
       if (TaskState.SUCCEEDED.toString().equals(taskInfo.getTaskStatus())) {
         ++numFinishedMaps;
@@ -341,7 +364,7 @@ public class TestJobHistoryParsing {
     return numFinishedMaps;
   }
   
-  @Test
+  @Test (timeout=50000)
   public void testHistoryParsingForFailedAttempts() throws Exception {
     LOG.info("STARTING testHistoryParsingForFailedAttempts");
     try {
@@ -468,7 +491,7 @@ public class TestJobHistoryParsing {
     }
   }
 
-  @Test
+  @Test (timeout=50000)
   public void testScanningOldDirs() throws Exception {
     LOG.info("STARTING testScanningOldDirs");
     try {