client.reinit() can raise an exception; catch in async producer

kafka/producer/base.py

@@ -78,9 +78,17 @@ def _send_upstream(queue, client, codec, batch_time, batch_size,
             retrying messages after stop_event is set, defaults to 30.
     """
     request_tries = {}
-    client.reinit()
-    stop_at = None
 
+    while not stop_event.is_set():
+        try:
+            client.reinit()
+        except Exception as e:
+            log.warn('Async producer failed to connect to brokers; backoff for %s(ms) before retrying', retry_options.backoff_ms)
+            time.sleep(float(retry_options.backoff_ms) / 1000)
+        else:
+            break
+
+    stop_at = None
     while not (stop_event.is_set() and queue.empty() and not request_tries):
 
         # Handle stop_timeout