[Tilecache] tilecache_seed dies at a specific tile - how can I skipit?

[Shawn Oatley]

I'm not sure how it works on Linux, but on Windows, the URL is mapserv.exe (your link it appears to be just mapserv).  
 
Shawn

>>> On 10/26/2009 at 3:41 AM, Adrian Popa <adrian_gh.popa at romtelecom.ro> wrote:
Hello everyone,

I'm getting an error while trying to cache offline parts of my map. The 
caching process runs fine until it hits a particular tile (my guess is 
it's tile 9143) - when the process dies (after a timeout of 2 minutes).

Here are samples of the output:

[root at terra utilities]# python /var/www/html/tilecache/tilecache_seed.py 
rtc_base 1 10 --bbox 
2255332.8831578,5336357.2739115,3306188.8761,6183726.4985628
...
07 (004621, 005229) = (2568284.1491 5542601.7932 2573176.1189 
5547493.7630) [0.0003s : 2391.549/s] 9137/37195
07 (004622, 005229) = (2573176.1189 5542601.7932 2578068.0887 
5547493.7630) [0.0003s : 2391.566/s] 9138/37195
07 (004623, 005229) = (2578068.0887 5542601.7932 2582960.0586 
5547493.7630) [0.0003s : 2391.586/s] 9139/37195
07 (004624, 005229) = (2582960.0586 5542601.7932 2587852.0284 
5547493.7630) [0.0003s : 2391.606/s] 9140/37195
07 (004625, 005229) = (2587852.0284 5542601.7932 2592743.9982 
5547493.7630) [0.0003s : 2391.624/s] 9141/37195
07 (004626, 005229) = (2592743.9982 5542601.7932 2597635.9680 
5547493.7630) [0.0003s : 2391.643/s] 9142/37195
Traceback (most recent call last):
  File "/var/www/html/tilecache/tilecache_seed.py", line 9, in ?
    TileCache.Client.main()
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Client.py", 
line 162, in main
    seed(svc, layer, map(int, args[1:3]), bboxlist , 
padding=options.padding, force = options.force, reverse = options.reverse)
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Client.py", 
line 117, in seed
    svc.renderTile(tile,force=force)
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Service.py", 
line 138, in renderTile
    data = layer.render(tile, force=force)
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Layer.py", 
line 443, in render
    return self.renderTile(tile)
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Layers/WMS.py", 
line 29, in renderTile
    tile.data, response = wms.fetch()
  File 
"/usr/lib/python2.4/site-packages/TileCache-2.10-py2.4.egg/TileCache/Client.py", 
line 58, in fetch
    response = self.client.open(urlrequest)
  File "/usr/lib/python2.4/urllib2.py", line 364, in open
    response = meth(req, response)
  File "/usr/lib/python2.4/urllib2.py", line 471, in http_response
    response = self.parent.error(
  File "/usr/lib/python2.4/urllib2.py", line 402, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.4/urllib2.py", line 337, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.4/urllib2.py", line 480, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 500: Internal Server Error

Here is what httpd error_log says:
[Mon Oct 26 09:23:13 2009] [warn] [client 127.0.0.1] Timeout waiting for 
output from CGI script /var/www/cgi-bin/mapserv
[Mon Oct 26 09:23:13 2009] [error] [client 127.0.0.1] Premature end of 
script headers: mapserv
[Mon Oct 26 09:25:13 2009] [warn] [client 127.0.0.1] Timeout waiting for 
output from CGI script /var/www/cgi-bin/mapserv


If I try with the --reverse parameter, the same thing happens after a 
while, but at a different tile.

I have two questions:
1. Can I convince tilecache to skip the tiles it can't render, instead 
of dying?
2. What would be the necessary steps I need to take to troubleshoot this 
problem? (I am generating this cache from a mapserver which is getting 
its data from shapefiles).

Thanks,
Adrian

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