[Tilesathome] real NoData tiles Was: either nodata or Forked render failure

[spaetz]

On Wed, Aug 27, 2008 at 09:28:25AM +0200, Florian Lohoff wrote:
> Here is an example - Handed out to a client of mine a couple minutes
> ago:

> [#130   0% Download] Putting job (12,54,113) back due to 'No data here (sliced)' 
> This is actually an empty tile.

Yes, No Data here really means the API did not respond at all, or it threw an error while responding. So its unfortunate, but the client is acting absolutely correct here.
 
> And its getting handed out to multiple clients in a row - all of them give
> the tile back with NoData.
> 
> There needs to be a differentiation between "DB Fail" and "No Data"

"No Data" really always means, API error or Internet connection error. Insofar, I don't see the problem with the t at h client.
Do you think it would be beneficial to return even more detailed error messages? ("No Data (HTTP code 500)") or somesuch?

spaetz

-----------------------------------------
I just tried it, that piece of empty sea seems to reliably throw an error 500:

spaetz at hal:~/src/tilesAthome2$ ./tilesGen.pl --Debug=1 xy 54 113
- Using working directory /home/spaetz/src/tilesAthome2/tmp
[...]
This is version 10207 (Rapperswil) of tilesgen running on linux, ID: 30163
[#1   0% jobinit] Doing tileset (12,54,113) (area around 84.111461,-175.209961) 
[#1   0% Download] Downloading: Map data for captionless,tile,maplint... 
Download
http://www.openstreetmap.org/api/0.5/map?bbox=-175.297852,84.105420,-175.122070,84.117503
failed with: 500 Internal Server Error
[#1   0% Download] Trying smaller slices 
[#1   0% Download] Downloading: Map data to /home/spaetz/src/tilesAthome2/tmp/12_54_113_7D3G0/data-1-1.osm (slice 1 of 10)... 
Download
http://www.openstreetmap.org/api/0.5/map?bbox=-175.297852,84.105420,-175.280273,84.117503
failed with: 500 Internal Server Error
[#1   0% Download] No data here (sliced) 
removing job dir/home/spaetz/src/tilesAthome2/tmp/12_54_113_7D3G0