Default BROKER_HEARTBEAT value is now set to 10 seconds

celery/app/defaults.py

@@ -67,7 +67,7 @@ NAMESPACES = {
         'CONNECTION_TIMEOUT': Option(4, type='float'),
         'CONNECTION_RETRY': Option(True, type='bool'),
         'CONNECTION_MAX_RETRIES': Option(100, type='int'),
-        'HEARTBEAT': Option(3, type='int'),
+        'HEARTBEAT': Option(10, type='int'),
         'POOL_LIMIT': Option(10, type='int'),
         'INSIST': Option(False, type='bool',
                          deprecate_by='2.4', remove_by='4.0'),