diff --git a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/ConfFactory.java b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/ConfFactory.java
index 4fa0164..120ee77 100644
--- a/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/ConfFactory.java
+++ b/hyracks/hyracks-hdfs/hyracks-hdfs-core/src/main/java/edu/uci/ics/hyracks/hdfs/dataflow/ConfFactory.java
@@ -27,7 +27,7 @@
         }
     }
 
-    public JobConf getConf() throws HyracksDataException {
+    public synchronized JobConf getConf() throws HyracksDataException {
         try {
             JobConf conf = new JobConf();
             DataInputStream dis = new DataInputStream(new ByteArrayInputStream(confBytes));