fix typo
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/dataset/hints/DatasetHints.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/dataset/hints/DatasetHints.java
index e27a4cb..dcd0a87 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/dataset/hints/DatasetHints.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/dataset/hints/DatasetHints.java
@@ -44,7 +44,7 @@
                 return h.validateValue(value);
             }
         }
-        return new Pair<Boolean, String>(false, "Unknwon hint :" + hintName);
+        return new Pair<Boolean, String>(false, "Unknown hint :" + hintName);
     }
 
     private static Set<IHint> hints = initHints();