[Tile-serving] Tiles aren't rendering

[Chris]

Hi Stephen,

if tiles don't render it could be a problem between renderd and the 
postgres db.

I would advise to restart renderd and look into syslog (grep renderd) 
before trying to render. If you see sth. like: "map failed to load", the 
reason could be db or file permissions, db names, missing shapefiles by 
openstreetmap-carto not applied to the db or even a missing mapnik xml 
file (or access permissions).

Also check the postgres log.

Also remember that low zooms are really slow in rendering (use 
render_list for those zoom <7).

What's the size of your db on what kind of filesystem? My last planet 
import had been more than 650gb on ext4.

Cheers,

Chris


Am 23.04.2019 um 20:47 schrieb Stephen D:
> Hi,
>
> My tile server is not rendering tiles. I had it working with 
> Canada(imported w/o a flat file), but after dropping the database and 
> re-importing the whole planet(with a flat file) it no longer works.
>
> The command I used to import was: osm2pgsql -d gis --create --slim  -G 
> --hstore --tag-transform-script 
> ~/src/openstreetmap-carto/openstreetmap-carto.lua --flat-nodes 
> ~/data/flatnodes.bin  -C 6000 --drop --number-processes 8 -S 
> ~/src/openstreetmap-carto/openstreetmap-carto.style 
> /home/stephen/planet-latest.osm.pbf
>
> When requesting a tile, this shows up in the log file:
>
> Apr 23 18:37:15 osm-tilemap renderd[1488]: DEBUG: Connection 0, fd 7 
> closed, now 0 left
> Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got incoming 
> connection, fd 7, number 1
> Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got incoming request 
> with protocol version 2
> Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got command 
> RenderPrio fd(7) xml(ajt), z(1), x(1), y(1), mime(image/png), options()
> Apr 23 18:39:51 osm-tilemap renderd[1488]: DEBUG: Connection 0, fd 7 
> closed, now 0 left
>
> After 30 seconds it times out. No tiles appear in the cache directory, 
> even after several minutes. The CPU reaches 20% per core for all 
> cores, and disk usage is around 200MB/s read. Both the CPU and disk 
> are used by the postgresql process.
>
> I am using apache2, mod_tile, mapnik, and renderd.
>
> Thanks,
>
> Stephen
>
>
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