diff --git a/fe/fe-core/src/main/cup/sql_parser.cup b/fe/fe-core/src/main/cup/sql_parser.cup
index bcef197ca9961b..28e716e8c7a5cf 100644
--- a/fe/fe-core/src/main/cup/sql_parser.cup
+++ b/fe/fe-core/src/main/cup/sql_parser.cup
@@ -3505,7 +3505,7 @@ key_value_map ::=
 
 opt_properties ::=
     {:
-    RESULT = null;
+    RESULT = Maps.newHashMap();
     :}
     | properties:properties
     {:
@@ -3644,7 +3644,7 @@ opt_actions ::=
 
 opt_ext_properties ::=
     {:
-    RESULT = null;
+    RESULT = Maps.newHashMap();
     :}
     | KW_BROKER properties:properties
     {:
diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/RefreshCatalogStmt.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/RefreshCatalogStmt.java
index 006eebe44b3912..a2e5930d142ca1 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/RefreshCatalogStmt.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/RefreshCatalogStmt.java
@@ -73,7 +73,8 @@ public void analyze(Analyzer analyzer) throws UserException {
         }
 
         // Set to false only if user set the property "invalid_cache"="false"
-        invalidCache = !(properties != null && properties.get(INVALID_CACHE).equalsIgnoreCase("false"));
+        invalidCache = !(properties.get(INVALID_CACHE) != null && properties.get(INVALID_CACHE)
+                .equalsIgnoreCase("false"));
     }
 
     @Override