diff --git a/pymilvus/orm/connections.py b/pymilvus/orm/connections.py
index 8941ed66c..0cd954440 100644
--- a/pymilvus/orm/connections.py
+++ b/pymilvus/orm/connections.py
@@ -233,7 +233,6 @@ def connect_milvus(**kwargs):
                         and connection_details["address"] == kwargs["address"]
                         and connection_details["user"] == kwargs["user"]
                         and connection_details["db_name"] == kwargs["db_name"]
-                        
                     ):
                         gh = self._connected_alias[key]
                         break
@@ -267,9 +266,8 @@ def connect_milvus(**kwargs):
         password = '' if password is None else str(password)
         db_name = '' if db_name is None else str(db_name)
 
-        address, user, password, db_name = self.__parse_info(address, uri, host, port, db_name, user, password)
-
-        if set([address, uri, host, port]) != {None}:
+        if set([address, uri, host, port]) != {''}:
+            address, user, password, db_name = self.__parse_info(address, uri, host, port, db_name, user, password)
             kwargs["address"] = address
 
         elif alias in self._alias:
@@ -362,13 +360,14 @@ def __parse_info(
             db_name: str = "",
             user: str = "",
             password: str = "",
-            ) -> dict:
+            **kwargs) -> dict:
 
         passed_in_address = ""
         passed_in_user = ""
         passed_in_password = ""
         passed_in_db_name = ""
 
+        # If uri
         if uri != "":
             passed_in_address, passed_in_user, passed_in_password, passed_in_db_name = (
                 self.__parse_address_from_uri(uri)
@@ -429,11 +428,13 @@ def __parse_address_from_uri(self, uri: str) -> Tuple[str, str, str, str]:
         user = parsed_uri.username if parsed_uri.username is not None else ""
         password = parsed_uri.password if parsed_uri.password is not None else ""
 
-        if host != "" and port != "":
-            self.__verify_host_port(host, port)
-            addr = f"{host}:{port}"
-        else:
-            addr = ""
+        if host == "":
+            raise ConnectionConfigException(message="Illegal uri: URI is missing host address: {}".format(uri))
+        if port == "":
+            raise ConnectionConfigException(message="Illegal uri: URI is missing port: {}".format(uri))
+
+        self.__verify_host_port(host, port)
+        addr = f"{host}:{port}"
 
         if not is_legal_address(addr):
             raise ConnectionConfigException(message=illegal_uri_msg.format(uri))
diff --git a/tests/test_connections.py b/tests/test_connections.py
index 0adcd75ee..8a0b6ec47 100644
--- a/tests/test_connections.py
+++ b/tests/test_connections.py
@@ -328,7 +328,6 @@ def test_add_connection_address_invalid(self, invalid_addr):
         {"uri": "http://127.0.0.1:19530"},
         {"uri": "http://localhost:19530"},
         {"uri": "http://example.com:80"},
-        {"uri": "http://example.com"},
     ])
     def test_add_connection_uri(self, valid_uri):
         alias = self.test_add_connection_uri.__name__
@@ -350,6 +349,8 @@ def test_add_connection_uri(self, valid_uri):
         {"uri": "http://"},
         {"uri": None},
         {"uri": -1},
+        {"uri": "http://example.com"},
+        {"uri": "http://:90"},
     ])
     def test_add_connection_uri_invalid(self, invalid_uri):
         alias = self.test_add_connection_uri_invalid.__name__