--- /dev/null
+#!/usr/bin/env python3
+
+'''Test race conditions about incomming NOTIFY during zonedb-reload'''
+
+from dnstest.test import Test
+from dnstest.utils import *
+
+import random
+import threading
+
+t = Test()
+
+master = t.server("knot")
+slave = t.server("knot")
+zones = t.zone_rnd(60, dnssec=False, records=10)
+t.link(zones, master, slave, ixfr=True)
+
+t.start()
+
+serials = slave.zones_wait(zones)
+
+def send_reload(server):
+ server.ctl("reload")
+
+def send_update(up):
+ up.send()
+
+for z in zones:
+ up = master.update(z)
+ up.add("dojdojwodijowjeojdwe", 3600, "A", "1.2.3.4")
+
+ threading.Thread(target=send_update, args=[up]).start()
+
+t.sleep(random.choice([0.1, 0.2, 0.5, 1, 2, 4]))
+
+slave.reload()
+
+slave.zones_wait(zones, serials)
+
+t.end()