[OSM-dev] Geofabrik OSM extracts breakage

Frederik Ramm frederik at remote.org
Mon Dec 7 18:38:04 UTC 2015


Hi,

   on the night of Saturday 05 December, a couple of European Geofabrik
country extracts (*not* the full Europe extract) failed to compute
correctly, and the auto-generated diff files for these region then
indicated the deletion of a very large number of objects (sometimes
*all* objects). This mistake was detected and fixed on Sunday noon, by
dropping the broken data and reverting to the previous version.

However, anyone who downloaded and applied the diff between Sunday ~ 4am
UTC and ~ noon UTC will probably have ruined their database and will
have to start anew from a full extract. Simply carrying on downloading
diffs will *not* suffice because when reverting to the previous version
we completely erased the broken diff, and hence the diff generated the
next night will *not* simply make everything good again if you consumed
one of the broken diffs.

A list of affected extracts is in this forum post:

http://forum.openstreetmap.org/viewtopic.php?pid=564747#p564747

I'm sorry if this has caused a hiccup in your downstream services and
I'm implementing a few extra sanity checks to avoid something similar in
the future.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"



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