diff --git a/CHANGES.txt b/CHANGES.txt
index 3e0dd8aacea..84280483e5e 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -147,6 +147,8 @@ Release 0.90.2 - Unreleased
    HBASE-3582  Allow HMaster and HRegionServer to login from keytab
                hen on secure Hadoop
    HBASE-3608  MemstoreFlusher error message doesnt include exception!
+   HBASE-3633  ZKUtil::createSetData should only create a node when it
+               nonexists (Guanpeng Xu via Stack)
 
   IMPROVEMENTS
    HBASE-3542  MultiGet methods in Thrift
diff --git a/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java b/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
index ead223f027f..ef063bc08e5 100644
--- a/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
+++ b/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
@@ -723,7 +723,7 @@ public class ZKUtil {
   public static void createSetData(final ZooKeeperWatcher zkw, final String znode,
       final byte [] data)
   throws KeeperException {
-    if (checkExists(zkw, znode) != -1) {
+    if (checkExists(zkw, znode) == -1) {
       ZKUtil.createWithParents(zkw, znode);
     }
     ZKUtil.setData(zkw, znode, data);