diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 9ebe603027c..228163bef5a 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -675,6 +675,9 @@ Release 0.23.7 - UNRELEASED
     MAPREDUCE-4822. Unnecessary conversions in History Events. (Chu Tong via
     jlowe)
 
+    MAPREDUCE-4974. Optimising the LineRecordReader initialize() method 
+    (Gelesh via bobby)
+
   BUG FIXES
 
     MAPREDUCE-4458. Warn if java.library.path is used for AM or Task
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
index e1dcee0b24b..93c3dc80407 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
@@ -81,13 +81,13 @@ public class LineRecordReader extends RecordReader<LongWritable, Text> {
     start = split.getStart();
     end = start + split.getLength();
     final Path file = split.getPath();
-    compressionCodecs = new CompressionCodecFactory(job);
-    codec = compressionCodecs.getCodec(file);
 
     // open the file and seek to the start of the split
     final FileSystem fs = file.getFileSystem(job);
     fileIn = fs.open(file);
     if (isCompressedInput()) {
+      compressionCodecs = new CompressionCodecFactory(job);
+      codec = compressionCodecs.getCodec(file);
       decompressor = CodecPool.getDecompressor(codec);
       if (codec instanceof SplittableCompressionCodec) {
         final SplitCompressionInputStream cIn =
@@ -166,9 +166,6 @@ public class LineRecordReader extends RecordReader<LongWritable, Text> {
     while (getFilePosition() <= end) {
       newSize = in.readLine(value, maxLineLength,
           Math.max(maxBytesToConsume(pos), maxLineLength));
-      if (newSize == 0) {
-        break;
-      }
       pos += newSize;
       if (newSize < maxLineLength) {
         break;
@@ -219,4 +216,4 @@ public class LineRecordReader extends RecordReader<LongWritable, Text> {
       }
     }
   }
-}
+}
\ No newline at end of file