id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
19451	Update data: Do not download incomplete ways	skyper	GerdP	"See #19124 which is the same problem in a similar situation.

==== What steps will reproduce the problem?
1. Have an incomplete, (modified) route relation with no or only a few downloaded children ways. See [attachment:incomplete_modified_relation_update.osm incomplete_modified_relation_update.osm]
1. Update data
 
==== What is the expected result?
Only the relation and the downloaded ways are updated and downloaded.

==== What happens instead?
Tonnes of objects are downloaded. The relation is completely downloaded.

==== Please provide any additional information below. Attach a screenshot if possible.
This uses seldom resources of time and server bandwidth and traffic should be minimized.
I hit this with more data and OSM-server time-out several times.
It also looks like first nodes and than complete ways are downloaded where the ways children could be downloaded with the way and not in advance.
Tried r15810 which shows the same problem but #4666 shows that it used to be different some time in the past.

{{{
Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-06-28 19:08:21 +0200 (Sun, 28 Jun 2020)
Revision:16727
Build-Date:2020-06-29 01:30:50
URL:https://josm.openstreetmap.de/svn/trunk
}}}
"	defect	closed	normal	20.07	Core	latest	fixed	template_report update data incomplete way