[Tilecache] tilecache_seed.py and "an error occured when fetching"

[cmose]

I periodically get a HTTP 500 (and I'm paraphrasing here as I don't remember
the specific message) "no image data returned" error message. This kept
killing my seeding process until I added another catch into Client.py. Funny
thing is that the url that errors out produces a perfectly valid tile when
hit independently of the seed script. For my issue I think it's probably the
server I'm pulling from as it never seems to be a real problem (and the
missed tile just gets cached when viewed next anyway).


Paul McCullough wrote:
> 
> All,
> 
> I am running:
> tilecache_seed.py "http://localhost:80/tilecache-1.9/tilecache.py?"
> sfgis_basemap 1 10 "5964000.0,2077000.0,6035000.0,2135000.0"
> 
> It runs fine but intermittantly produces "an error occured when fetching".
> 
> detail:
> An error occured when fetching: HTTP Error 500: Internal Server Error
> URL:
> http://localhost:80/tilecache-1.9/tilecache.py?layers=sfgis_basemap&styles=
> &service=WMS&width=256&format=image%2Fpng&request=GetMap&height=256&srs=EPSG%3A2
> 227&version=1.1.1&bbox=6009761.71875%2C2118601.5625%2C6010039.0625%2C2118878.906
> 25
> 
> The bounding box spec'ed in the seed cmd is exactly the same as the
> bounding box in the 
> geoserver layer.  It occurs with some regulatity, say every 20 calls or
> so. Is this some sort of edge condition?
> 
> The apache error log has this:
> [Fri Dec 14 19:08:01 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Service.py'
> [Fri Dec 14 19:08:01 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Layer.py'
> [Fri Dec 14 19:08:05 2007] [warn] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Module imports an ancestor
> module. This may cause problems. Please check code. File doing import is
> "C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Layer.py".
> [Fri Dec 14 19:08:05 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Service.py'
> [Fri Dec 14 19:08:05 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Layer.py'
> [Fri Dec 14 19:08:09 2007] [warn] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Module imports an ancestor
> module. This may cause problems. Please check code. File doing import is
> "C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Layer.py".
> [Fri Dec 14 19:08:09 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Service.py'
> [Fri Dec 14 19:08:09 2007] [notice] mod_python (pid=5424,
> interpreter='CCSF-PMcCullough.ci.sf.ca.us'): Reimporting module
> 'C:\\Program Files\\Apache Software
> Foundation\\Apache2.2\\htdocs\\tilecache-1.9\\TileCache\\Layer.py'
> 
> But it appears to be working; images are being cached.
> 
> Thanks,
> Paul
> 
> 

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