Close sockets when done with them

src/lib/python/isc/notify/notify_out.py

@@ -253,7 +253,9 @@ class NotifyOut:
         self._thread.join()
 
         # Clean up
+        self._write_sock.close()
         self._write_sock = None
+        self._read_sock.close()
         self._read_sock = None
         self._thread = None
 

src/lib/python/isc/notify/tests/notify_out_test.py

@@ -195,6 +195,11 @@ class TestNotifyOut(unittest.TestCase):
         # Now make one socket be readable
         self._notify._notify_infos[('example.net.', 'IN')].notify_timeout = time.time() + 10
         self._notify._notify_infos[('example.com.', 'IN')].notify_timeout = time.time() + 10
+
+        if self._notify._read_sock is not None:
+            self._notify._read_sock.close()
+        if self._notify._write_sock is not None:
+            self._notify._write_sock.close()
         self._notify._read_sock, self._notify._write_sock = socket.socketpair()
         self._notify._write_sock.send(SOCK_DATA)
         replied_zones, timeout_zones = self._notify._wait_for_notify_reply()