MAPREDUCE-6191. Improve clearing stale state of Java serialization

                testcase.  (Sam Liu via Eric Yang)

hadoop-mapreduce-project/CHANGES.txt

@@ -94,6 +94,9 @@ Trunk (Unreleased)
 
   BUG FIXES
 
+    MAPREDUCE-6191. Improve clearing stale state of Java serialization
+                    testcase.  (Sam Liu via Eric Yang)
+
     MAPREDUCE-5714. Removed forceful JVM exit in shutDownJob.  
                      (Jinghui Wang via Eric Yang)
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestJavaSerialization.java

@@ -81,7 +81,7 @@ public class TestJavaSerialization extends TestCase {
   }
 
   private void cleanAndCreateInput(FileSystem fs) throws IOException {
-    fs.delete(INPUT_FILE, true);
+    fs.delete(INPUT_DIR, true);
     fs.delete(OUTPUT_DIR, true);
 
     OutputStream os = fs.create(INPUT_FILE);