diff --git a/zeppelin-server/src/main/java/org/apache/zeppelin/socket/Message.java b/zeppelin-server/src/main/java/org/apache/zeppelin/socket/Message.java
index 6315f119c4d..c6f9abe28f7 100644
--- a/zeppelin-server/src/main/java/org/apache/zeppelin/socket/Message.java
+++ b/zeppelin-server/src/main/java/org/apache/zeppelin/socket/Message.java
@@ -102,8 +102,8 @@ public static enum OP {
 
   public OP op;
   public Map<String, Object> data = new HashMap<String, Object>();
-  public String ticket;
-  public String principal;
+  public String ticket = "anonymous";
+  public String principal = "anonymous";
 
   public Message(OP op) {
     this.op = op;