Where did mapnik store the produced tiles?

What does mapnik have to to with the renderer? Does the renderer generate tiles or does it use mapnik to generate them? Did mapnik generate the …//0/0/0.png tile already? Then where does it reside?

Please explain a bit how the rendere uses mapnik, if it does.

File does not exist: If you put some favicon.ico in that directory does the error go away?

For me it is strange that “osm_tiles2/0” is called a file.

Now did you check if file “/var/www/osm_tiles2/0/0/0.png” is in the mentioned directory?

Or is /var/www/osm_tiles2/0/0 not a physical directory?