HDFS-2575. DFSTestUtil may create empty files. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1204651 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -48,6 +48,8 @@ Release 0.23.1 - UNRELEASED
 
     HDFS-2567. When 0 DNs are available, show a proper error when
     trying to browse DFS via web UI. (harsh via eli)
+
+    HDFS-2575. DFSTestUtil may create empty files (todd)
     
 Release 0.23.0 - 2011-11-01 
 

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java

@@ -84,6 +84,7 @@ public class DFSTestUtil {
   
   private int maxLevels;// = 3;
   private int maxSize;// = 8*1024;
+  private int minSize = 1;
   private int nFiles;
   private MyFile[] files;
   
@@ -139,7 +140,7 @@ public class DFSTestUtil {
       long fidx = -1;
       while (fidx < 0) { fidx = gen.nextLong(); }
       name = name + Long.toString(fidx);
-      size = gen.nextInt(maxSize);
+      size = minSize + gen.nextInt(maxSize - minSize);
       seed = gen.nextLong();
     }