Ignore disappearing network devices while querying them (#3249)

Sometimes NetworkManager network devices disappear while we are query
them. Presumably those are network interfaces generated by Docker.
Skip them and print a warning.

supervisor/dbus/network/__init__.py

@@ -13,6 +13,7 @@ from ...exceptions import (
     DBusError,
     DBusFatalError,
     DBusInterfaceError,
+    DBusInterfaceMethodError,
     HostNotSupportedError,
 )
 from ...utils.dbus import DBus
@@ -162,7 +163,10 @@ class NetworkManager(DBusInterface):
             # Connect to interface
             try:
                 await interface.connect()
-            except DBusFatalError as err:
+            except (DBusFatalError, DBusInterfaceMethodError) as err:
+                # Docker creates and deletes interfaces quite often, sometimes
+                # this causes a race condition: A device disappears while we
+                # try to query it. Ignore those cases.
                 _LOGGER.warning("Can't process %s: %s", device, err)
                 continue
             except Exception as err:  # pylint: disable=broad-except

supervisor/utils/dbus.py

@@ -162,11 +162,10 @@ class DBus:
         )
 
         if reply.message_type == MessageType.ERROR:
-            if reply.error_name in (
-                "org.freedesktop.DBus.Error.ServiceUnknown",
-                "org.freedesktop.DBus.Error.UnknownMethod",
-            ):
+            if reply.error_name == "org.freedesktop.DBus.Error.ServiceUnknown":
                 raise DBusInterfaceError(reply.body[0])
+            if reply.error_name == "org.freedesktop.DBus.Error.UnknownMethod":
+                raise DBusInterfaceMethodError(reply.body[0])
             if reply.error_name == "org.freedesktop.DBus.Error.Disconnected":
                 raise DBusNotConnectedError()
             if reply.body and len(reply.body) > 0: