Apply new _get_conn connect logic in KafkaClient.check_version

kafka/client_async.py

@@ -598,18 +598,26 @@ class KafkaClient(object):
                 raise Errors.NoBrokersAvailable()
 
         def connect(node_id):
-            timeout_at = time.time() + timeout
-            # brokers < 0.9 do not return any broker metadata if there are no topics
-            # so we're left with a single bootstrap connection
-            while not self.ready(node_id):
-                if time.time() >= timeout_at:
-                    raise Errors.NodeNotReadyError(node_id)
-                time.sleep(0.025)
-
+            self._maybe_connect(node_id)
+            conn = self._conns[node_id]
             # Monkeypatch the connection request timeout
             # Generally this timeout should not get triggered
             # but in case it does, we want it to be reasonably short
-            self._conns[node_id].config['request_timeout_ms'] = timeout * 1000
+            conn.config['request_timeout_ms'] = timeout * 1000
+            if conn.connected():
+                return
+
+            timeout_at = time.time() + timeout
+            # brokers < 0.9 do not return any broker metadata if there are no topics
+            # so we're left with a single bootstrap connection
+            while time.time() < timeout_at and conn.connecting():
+                if conn.connect() is ConnectionStates.CONNECTED:
+                    break
+                else:
+                    time.sleep(0.05)
+            else:
+                conn.close()
+                raise Errors.NodeNotReadyError(node_id)
 
         # kafka kills the connection when it doesnt recognize an API request
         # so we can send a test request and then follow immediately with a