diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index c013ffc19fc..78f5ac4227a 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -26,6 +26,10 @@ Release 0.23.2 - UNRELEASED
     MAPREDUCE-3864. Fix cluster setup docs for correct SecondaryNameNode
     HTTPS parameters. (todd)
 
+    MAPREDUCE-3856. Instances of RunningJob class givs incorrect job tracking
+    urls when mutiple jobs are submitted from same client jvm. (Eric Payne via
+    sseth)
+ 
 Release 0.23.1 - 2012-02-08 
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java
index b308c1a074c..39e32515d14 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/ClientServiceDelegate.java
@@ -81,8 +81,7 @@ public class ClientServiceDelegate {
   private static final Log LOG = LogFactory.getLog(ClientServiceDelegate.class);
 
   // Caches for per-user NotRunningJobs
-  private static HashMap<JobState, HashMap<String, NotRunningJob>> notRunningJobs =
-      new HashMap<JobState, HashMap<String, NotRunningJob>>();
+  private HashMap<JobState, HashMap<String, NotRunningJob>> notRunningJobs;
 
   private final Configuration conf;
   private final JobID jobId;
@@ -108,6 +107,7 @@ public class ClientServiceDelegate {
     this.jobId = jobId;
     this.historyServerProxy = historyServerProxy;
     this.appId = TypeConverter.toYarn(jobId).getAppId();
+    notRunningJobs = new HashMap<JobState, HashMap<String, NotRunningJob>>();
   }
 
   // Get the instance of the NotRunningJob corresponding to the specified
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestMRJobs.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestMRJobs.java
index 562e865410d..59b8689b20d 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestMRJobs.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/TestMRJobs.java
@@ -148,10 +148,15 @@ public class TestMRJobs {
     job.addFileToClassPath(APP_JAR); // The AppMaster jar itself.
     job.setJarByClass(SleepJob.class);
     job.setMaxMapAttempts(1); // speed up failures
-    job.waitForCompletion(true);
+    job.submit();
+    String trackingUrl = job.getTrackingURL();
+    String jobId = job.getJobID().toString();
     boolean succeeded = job.waitForCompletion(true);
     Assert.assertTrue(succeeded);
     Assert.assertEquals(JobStatus.State.SUCCEEDED, job.getJobState());
+    Assert.assertTrue("Tracking URL was " + trackingUrl +
+                      " but didn't Match Job ID " + jobId ,
+          trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));
     verifySleepJobCounters(job);
     verifyTaskProgress(job);
     
@@ -209,9 +214,15 @@ public class TestMRJobs {
     job.addFileToClassPath(APP_JAR); // The AppMaster jar itself.
     job.setJarByClass(RandomTextWriterJob.class);
     job.setMaxMapAttempts(1); // speed up failures
+    job.submit();
+    String trackingUrl = job.getTrackingURL();
+    String jobId = job.getJobID().toString();
     boolean succeeded = job.waitForCompletion(true);
     Assert.assertTrue(succeeded);
     Assert.assertEquals(JobStatus.State.SUCCEEDED, job.getJobState());
+    Assert.assertTrue("Tracking URL was " + trackingUrl +
+                      " but didn't Match Job ID " + jobId ,
+          trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));
     
     // Make sure there are three files in the output-dir
     
@@ -316,9 +327,14 @@ public class TestMRJobs {
         new Path(mrCluster.getTestWorkDir().getAbsolutePath(),
         "failmapper-output"));
     job.addFileToClassPath(APP_JAR); // The AppMaster jar itself.
+    job.submit();
+    String trackingUrl = job.getTrackingURL();
+    String jobId = job.getJobID().toString();
     boolean succeeded = job.waitForCompletion(true);
     Assert.assertFalse(succeeded);
-
+    Assert.assertTrue("Tracking URL was " + trackingUrl +
+                      " but didn't Match Job ID " + jobId ,
+          trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));
     return job;
   }
 
@@ -360,8 +376,14 @@ public class TestMRJobs {
         // //Job with reduces
         // Job job = sleepJob.createJob(3, 2, 10000, 1, 10000, 1);
         job.addFileToClassPath(APP_JAR); // The AppMaster jar itself.
+        job.submit();
+        String trackingUrl = job.getTrackingURL();
+        String jobId = job.getJobID().toString();
         job.waitForCompletion(true);
         Assert.assertEquals(JobStatus.State.SUCCEEDED, job.getJobState());
+        Assert.assertTrue("Tracking URL was " + trackingUrl +
+                          " but didn't Match Job ID " + jobId ,
+          trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));
         return null;
       }
     });
@@ -444,7 +466,12 @@ public class TestMRJobs {
     job.setMaxMapAttempts(1); // speed up failures
 
     job.submit();
+    String trackingUrl = job.getTrackingURL();
+    String jobId = job.getJobID().toString();
     Assert.assertTrue(job.waitForCompletion(false));
+    Assert.assertTrue("Tracking URL was " + trackingUrl +
+                      " but didn't Match Job ID " + jobId ,
+          trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));
   }
 
   private Path createTempFile(String filename, String contents)