Fix error on to big change id on websocket connection

openslides/utils/consumers.py

@@ -41,9 +41,15 @@ class SiteConsumer(ProtocollAsyncJsonWebsocketConsumer):
             await self.channel_layer.group_add('autoupdate', self.channel_name)
 
         await self.accept()
+
         if change_id is not None:
-            data = await get_element_data(self.scope['user'], change_id)
-            await self.send_json(type='autoupdate', content=data)
+            try:
+                data = await get_element_data(self.scope['user'], change_id)
+            except ValueError:
+                # When the change_id is to big, do nothing
+                pass
+            else:
+                await self.send_json(type='autoupdate', content=data)
 
     async def disconnect(self, close_code: int) -> None:
         """

tests/integration/utils/test_consumers.py

@@ -101,6 +101,17 @@ async def test_connection_with_invalid_change_id(get_communicator):
     assert connected is False
 
 
+@pytest.mark.asyncio
+async def test_connection_with_to_big_change_id(get_communicator):
+    await set_config('general_system_enable_anonymous', True)
+    communicator = get_communicator('change_id=1000000000000')
+
+    connected, __ = await communicator.connect()
+
+    assert connected is True
+    assert await communicator.receive_nothing()
+
+
 @pytest.mark.asyncio
 async def test_changed_data_autoupdate_off(communicator):
     await set_config('general_system_enable_anonymous', True)