diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
index ad4f70f11c9..d0e1d5938ac 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
@@ -3150,6 +3150,10 @@ public class AssignmentManager extends ZooKeeperListener {
         invokeUnassign(regionInfo);
         break;
         
+      case SPLIT:
+      case SPLITTING:
+        break;
+        
       default:
         throw new IllegalStateException("Received event is not valid.");
       }