HADOOP-8818. Use equals instead == in MD5MD5CRC32FileChecksum and TFileDumper. Contributed by Brandon Li.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1385374 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit 0c53ed4cd122f87b2b041d670b9b59e27da5439c)
(cherry picked from commit 7b64e5805747f7be8ad1b8cbcefc7a312350a199)

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

@@ -1100,6 +1100,9 @@ Release 2.7.3 - UNRELEASED
     HADOOP-12792. TestUserGroupInformation#testGetServerSideGroups fails in
     chroot (Eric Badger via jlowe)
 
+    HADOOP-8818. Use equals instead == in MD5MD5CRC32FileChecksum
+    and TFileDumper. (Brandon Li via suresh)
+
 Release 2.7.2 - 2016-01-25
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/MD5MD5CRC32FileChecksum.java

@@ -134,7 +134,7 @@ public class MD5MD5CRC32FileChecksum extends FileChecksum {
 
     try {
       // old versions don't support crcType.
-      if (crcType == null || crcType == "") {
+      if (crcType == null || crcType.equals("")) {
         finalCrcType = DataChecksum.Type.CRC32;
       } else {
         finalCrcType = DataChecksum.Type.valueOf(crcType);

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/file/tfile/TFileDumper.java

@@ -126,7 +126,7 @@ class TFileDumper {
           dataSizeUncompressed += region.getRawSize();
         }
         properties.put("Data Block Bytes", Long.toString(dataSize));
-        if (reader.readerBCF.getDefaultCompressionName() != "none") {
+        if (!reader.readerBCF.getDefaultCompressionName().equals("none")) {
           properties.put("Data Block Uncompressed Bytes", Long
               .toString(dataSizeUncompressed));
           properties.put("Data Block Compression Ratio", String.format(