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From bo...@apache.org
Subject svn commit: r1463360 - in /hadoop/common/branches/branch-2/hadoop-mapreduce-project: CHANGES.txt hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
Date Tue, 02 Apr 2013 02:15:09 GMT
Author: bobby
Date: Tue Apr  2 02:15:08 2013
New Revision: 1463360

URL: http://svn.apache.org/r1463360
Log:
Reverted MAPREDUCE-4974 because of test failures.

Modified:
    hadoop/common/branches/branch-2/hadoop-mapreduce-project/CHANGES.txt
    hadoop/common/branches/branch-2/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java

Modified: hadoop/common/branches/branch-2/hadoop-mapreduce-project/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-mapreduce-project/CHANGES.txt?rev=1463360&r1=1463359&r2=1463360&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-mapreduce-project/CHANGES.txt (original)
+++ hadoop/common/branches/branch-2/hadoop-mapreduce-project/CHANGES.txt Tue Apr  2 02:15:08
2013
@@ -675,9 +675,6 @@ 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

Modified: hadoop/common/branches/branch-2/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java?rev=1463360&r1=1463359&r2=1463360&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
(original)
+++ hadoop/common/branches/branch-2/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java
Tue Apr  2 02:15:08 2013
@@ -81,13 +81,13 @@ public class LineRecordReader extends Re
     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 =
@@ -166,6 +166,9 @@ public class LineRecordReader extends Re
     while (getFilePosition() <= end) {
       newSize = in.readLine(value, maxLineLength,
           Math.max(maxBytesToConsume(pos), maxLineLength));
+      if (newSize == 0) {
+        break;
+      }
       pos += newSize;
       if (newSize < maxLineLength) {
         break;
@@ -216,4 +219,4 @@ public class LineRecordReader extends Re
       }
     }
   }
-}
\ No newline at end of file
+}



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