HADOOP-11581. Multithreaded correctness Warnings #org.apache.hadoop.fs.shell.Ls (Brahma Reddy Battula via aw)

(cherry picked from commit b015fec6011586784fd6f4791a0c1c22e3902046)

Conflicts:
	hadoop-common-project/hadoop-common/CHANGES.txt

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -251,6 +251,9 @@ Release 2.8.0 - UNRELEASED
     HADOOP-10582. Fix the test case for copying to non-existent dir in
     TestFsShellCopy. (Kousuke Saruta via aajisaka)
 
+    HADOOP-11581. Multithreaded correctness Warnings
+    #org.apache.hadoop.fs.shell.Ls (Brahma Reddy Battula via aw)
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Ls.java

@@ -87,7 +87,7 @@ class Ls extends FsCommand {
           "  Use time of last access instead of modification for\n" +
           "      display and sorting.";
 
-  protected static final SimpleDateFormat dateFormat =
+  protected final SimpleDateFormat dateFormat =
     new SimpleDateFormat("yyyy-MM-dd HH:mm");
 
   protected int maxRepl = 3, maxLen = 10, maxOwner = 0, maxGroup = 0;