MAPREDUCE-6817. The format of job start time in JHS is different from those of submit and finish time. (Haibo Chen via kasha)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsJobsBlock.java

@@ -79,7 +79,7 @@ public class HsJobsBlock extends HtmlBlock {
       JobInfo job = new JobInfo(j);
       jobsTableData.append("[\"")
       .append(dateFormat.format(new Date(job.getSubmitTime()))).append("\",\"")
-      .append(job.getStartTimeStr()).append("\",\"")
+      .append(job.getFormattedStartTimeStr(dateFormat)).append("\",\"")
       .append(dateFormat.format(new Date(job.getFinishTime()))).append("\",\"")
       .append("<a href='").append(url("job", job.getId())).append("'>")
       .append(job.getId()).append("</a>\",\"")

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/dao/JobInfo.java

@@ -17,6 +17,7 @@
  */
 package org.apache.hadoop.mapreduce.v2.hs.webapp.dao;
 
+import java.text.DateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
@@ -27,6 +28,7 @@
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlTransient;
 
+import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.mapreduce.JobACL;
 import org.apache.hadoop.mapreduce.v2.api.records.JobReport;
 import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
@@ -44,7 +46,8 @@
 @XmlRootElement(name = "job")
 @XmlAccessorType(XmlAccessType.FIELD)
 public class JobInfo {
-  private static final String NA = "N/A";
+  @VisibleForTesting
+  static final String NA = "N/A";
 
   protected long submitTime;
   protected long startTime;
@@ -228,6 +231,16 @@ public long getStartTime() {
     return this.startTime;
   }
 
+  public String getFormattedStartTimeStr(final DateFormat dateFormat) {
+    String str = NA;
+
+    if (startTime >= 0) {
+      str = dateFormat.format(new Date(startTime));
+    }
+
+    return str;
+  }
+
   public String getStartTimeStr() {
     String str = NA;
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/webapp/dao/TestJobInfo.java

@@ -22,6 +22,8 @@
 import static org.mockito.Mockito.when;
 
 import java.io.IOException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.HashMap;
 
@@ -153,7 +155,7 @@ public void testGetStartTimeStr() {
     when(job.getID()).thenReturn(jobId);
 
     JobInfo jobInfo = new JobInfo(job);
-    Assert.assertEquals("N/A", jobInfo.getStartTimeStr());
+    Assert.assertEquals(JobInfo.NA, jobInfo.getStartTimeStr());
 
     Date date = new Date();
     when(jobReport.getStartTime()).thenReturn(date.getTime());
@@ -161,4 +163,29 @@ public void testGetStartTimeStr() {
     jobInfo = new JobInfo(job);
     Assert.assertEquals(date.toString(), jobInfo.getStartTimeStr());
   }
+
+  @Test
+  public void testGetFormattedStartTimeStr() {
+    JobReport jobReport = mock(JobReport.class);
+    when(jobReport.getStartTime()).thenReturn(-1L);
+
+    Job job = mock(Job.class);
+    when(job.getReport()).thenReturn(jobReport);
+    when(job.getName()).thenReturn("TestJobInfo");
+    when(job.getState()).thenReturn(JobState.SUCCEEDED);
+
+    JobId jobId = MRBuilderUtils.newJobId(1L, 1, 1);
+    when(job.getID()).thenReturn(jobId);
+    DateFormat dateFormat = new SimpleDateFormat();
+
+    JobInfo jobInfo = new JobInfo(job);
+    Assert.assertEquals(
+        JobInfo.NA, jobInfo.getFormattedStartTimeStr(dateFormat));
+
+    Date date = new Date();
+    when(jobReport.getStartTime()).thenReturn(date.getTime());
+    jobInfo = new JobInfo(job);
+    Assert.assertEquals(
+        dateFormat.format(date), jobInfo.getFormattedStartTimeStr(dateFormat));
+  }
 }