diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/JobContextImpl.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/JobContextImpl.java
index 1cf2f4ea5ae..85cdaf07be4 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/JobContextImpl.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/JobContextImpl.java
@@ -27,7 +27,6 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configuration.IntegerRanges;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.RawComparator;
-import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapreduce.InputFormat;
 import org.apache.hadoop.mapreduce.Job;
 import org.apache.hadoop.mapreduce.JobContext;
@@ -61,11 +60,7 @@ public class JobContextImpl implements JobContext {
   protected final Credentials credentials;
   
   public JobContextImpl(Configuration conf, JobID jobId) {
-    if (conf instanceof JobConf) {
-      this.conf = (JobConf)conf;
-    } else {
-      this.conf = new org.apache.hadoop.mapred.JobConf(conf);
-    }
+    this.conf = new org.apache.hadoop.mapred.JobConf(conf);
     this.jobId = jobId;
     this.credentials = this.conf.getCredentials();
     try {
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java
index ff59b0bb448..37516460103 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/main/java/org/apache/hadoop/mapred/YARNRunner.java
@@ -223,10 +223,23 @@ public class YARNRunner implements ClientProtocol {
       throw new YarnException(e);
     }
 
+    // XXX Remove
+    Path submitJobDir = new Path(jobSubmitDir);
+    FileContext defaultFS = FileContext.getFileContext(conf);
+    Path submitJobFile =
+      defaultFS.makeQualified(JobSubmissionFiles.getJobConfPath(submitJobDir));
+    FSDataInputStream in = defaultFS.open(submitJobFile);
+    conf.addResource(in);
+    // ---
+
     // Construct necessary information to start the MR AM
     ApplicationSubmissionContext appContext = 
       createApplicationSubmissionContext(conf, jobSubmitDir, ts);
     
+    // XXX Remove
+    in.close();
+    // ---
+    
     // Submit to ResourceManager
     ApplicationId applicationId = resMgrDelegate.submitApplication(appContext);