enhance: change connection timeout to clearer msg

pymilvus/client/check.py

@@ -23,10 +23,7 @@ def is_legal_address(addr: Any) -> bool:
 
 
 def is_legal_host(host: Any) -> bool:
-    if not isinstance(host, str):
-        return False
-
-    if len(host) == 0:
+    if not isinstance(host, str) or len(host) == 0 or (":" in host):
         return False
 
     return True

pymilvus/client/grpc_handler.py

@@ -145,7 +145,7 @@ def _wait_for_channel_ready(self, timeout: Union[float] = 10):
         except grpc.FutureTimeoutError as e:
             raise MilvusException(
                 code=Status.CONNECT_FAILED,
-                message=f"Fail connecting to server on {self._address}. Timeout",
+                message=f"Fail connecting to server on {self._address}, illegal connection params or server unavailable",
             ) from e
         except Exception as e:
             raise e from e

pymilvus/orm/connections.py

@@ -257,11 +257,17 @@ def __get_full_address(
             address, parsed = self.__parse_address_from_uri(uri)
             return address, parsed
 
-        host = host if host != "" else Config.DEFAULT_HOST
-        port = port if port != "" else Config.DEFAULT_PORT
-        self.__verify_host_port(host, port)
+        _host = host if host != "" else Config.DEFAULT_HOST
+        _port = port if port != "" else Config.DEFAULT_PORT
+        self.__verify_host_port(_host, _port)
+
+        addr = f"{_host}:{_port}"
+        if not is_legal_address(addr):
+            raise ConnectionConfigException(
+                message=f"Illegal host: {host} or port: {port}, should be in form of '111.1.1.1', '19530'"
+            )
 
-        return f"{host}:{port}", None
+        return addr, None
 
     def disconnect(self, alias: str):
         """Disconnects connection from the registry.