diff --git a/genomix/genomix-hadoop/data/webmap/8 b/genomix/genomix-hadoop/data/webmap/8
new file mode 100644
index 0000000..3959d4d
--- /dev/null
+++ b/genomix/genomix-hadoop/data/webmap/8
@@ -0,0 +1 @@
+1	AATAGAACTT
diff --git a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GenomixMapper.java b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GenomixMapper.java
index 3b615cb..98f561f 100644
--- a/genomix/genomix-hadoop/src/main/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GenomixMapper.java
+++ b/genomix/genomix-hadoop/src/main/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GenomixMapper.java
@@ -226,7 +226,7 @@
     public void setCurKmerByOldNextKmer(){
     	curKmerDir = nextKmerDir;
     	curForwardKmer.set(nextForwardKmer);
-    	preReverseKmer.set(nextReverseKmer);
+    	curReverseKmer.set(nextReverseKmer);
     }
     
     public void setMapperOutput(OutputCollector<KmerBytesWritable, NodeWritable> output) throws IOException{
diff --git a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GraphBuildingTest.java b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GraphBuildingTest.java
index 797efb2..42c43f8 100644
--- a/genomix/genomix-hadoop/src/test/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GraphBuildingTest.java
+++ b/genomix/genomix-hadoop/src/test/java/edu/uci/ics/genomix/hadoop/contrailgraphbuilding/GraphBuildingTest.java
@@ -22,13 +22,13 @@
     private JobConf conf = new JobConf();
     private static final String ACTUAL_RESULT_DIR = "actual";
     private static final String HADOOP_CONF_PATH = ACTUAL_RESULT_DIR + File.separator + "conf.xml";
-    private static final String DATA_PATH = "data/webmap/test.txt";
+    private static final String DATA_PATH = "data/webmap/8";
     private static final String HDFS_PATH = "/webmap";
     private static final String RESULT_PATH = "/result";
     
 //    private static final int COUNT_REDUCER = 2;
-    private static final int SIZE_KMER = 5;
-    private static final int READ_LENGTH = 8;
+    private static final int SIZE_KMER = 3;
+    private static final int READ_LENGTH = 10;
     
     private MiniDFSCluster dfsCluster;
     private MiniMRCluster mrCluster;