diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index b36d1636b9..5b4066b80f 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -234,6 +234,10 @@ Trunk (Unreleased)
     HADOOP-8815. RandomDatum needs to override hashCode().
     (Brandon Li via suresh)
 
+    HADOOP-8436. NPE In getLocalPathForWrite ( path, conf ) when the
+    required context item is not configured
+    (Brahma Reddy Battula via harsh)
+
   OPTIMIZATIONS
 
     HADOOP-7761. Improve the performance of raw comparisons. (todd)
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalDirAllocator.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalDirAllocator.java
index 3e305930fd..16a1c99b5c 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalDirAllocator.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalDirAllocator.java
@@ -265,6 +265,9 @@ public AllocatorPerContext(String contextCfgItemName) {
     private synchronized void confChanged(Configuration conf) 
         throws IOException {
       String newLocalDirs = conf.get(contextCfgItemName);
+      if (null == newLocalDirs) {
+        throw new IOException(contextCfgItemName + " not configured");
+      }
       if (!newLocalDirs.equals(savedLocalDirs)) {
         localDirs = StringUtils.getTrimmedStrings(newLocalDirs);
         localFS = FileSystem.getLocal(conf);
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
index 3b76a56feb..7a4618e650 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
@@ -293,6 +293,23 @@ public void testLocalPathForWriteDirCreation() throws IOException {
     }
   }
 
+  /*
+   * Test when mapred.local.dir not configured and called
+   * getLocalPathForWrite
+   */
+  @Test
+  public void testShouldNotthrowNPE() throws Exception {
+    Configuration conf1 = new Configuration();
+    try {
+      dirAllocator.getLocalPathForWrite("/test", conf1);
+      fail("Exception not thrown when " + CONTEXT + " is not set");
+    } catch (IOException e) {
+      assertEquals(CONTEXT + " not configured", e.getMessage());
+    } catch (NullPointerException e) {
+      fail("Lack of configuration should not have thrown an NPE.");
+    }
+  }
+
   /** Test no side effect files are left over. After creating a temp
    * temp file, remove both the temp file and its parent. Verify that
    * no files or directories are left over as can happen when File objects