I'm pre-rendering a small section of a map for offline use, and I'm getting errors from the output of render_list. I've set up a postgreSQL database with postGIS, and I'm using Mod Tile/Renderd to serve tiles.
The command itself returns zero, and the metaimages appear to have been created, but I'm still seeing cryptic error messages on stdout.
For example, if I run this command:
render_list -z 20 -Z 20 -a -x 66 -X 71 -y 94 -Y 99 -n 8
I would get this output:
Rendering all tiles for zoom 20 from (66, 94) to (71, 99)
Waiting for rendering threads to finish
rendering failed with command 0, pausing.
Are these error messages benign? I can't find any documentation on what the codes mean.
Best Answer
What you've posted above is the output from "render_list". "renderd" will be sending output to wherever you've told it to go. https://switch2osm.org/manually-building-a-tile-server-16-04-2-lts/ contains information about how to see information in the foreground ("Running renderd for the first time") and sending it to syslog ("Running renderd in the background").
However, it's also worth checking the x, X, y and Y parameters that you're using. Are they definitely correct for the data that you want rendered at zoom 20?