[Tilecache] Preponderance of "stuck lock" errors when running tilecache_seed.py

[Gissur Þórhallsson]

Sorry to bump an old thread, but after going through an issue not unlike
this one, I have found that on linux, the vast majority of stuck locks are
due to poorly set permissions on the cache directory.

Personally I was pre-seeded as one user(www-data) while mod_wsgi was
generating tiles on the fly as another(daemon).
Tilecache encounters a stuck lock error during slicing up the metatile ,
efore it can experience a Permission Denied error.

Just thought I'd throw my two cents in there.

Kind regards,
Gissur

On Thu, Jan 8, 2009 at 7:55 PM, Christopher Schmidt <crschmidt at metacarta.com
> wrote:

> On Thu, Jan 08, 2009 at 11:31:25AM -0800, Roger André wrote:
> > Ok, so then if MetaTiling is used, the tilecache cannot be viewed while
> it
> > is being seeded. Correct?
>
> Typically, the TileCache 'lock' sticks around for 30 secnds before it
> thinks it is 'stuck'. This is configurable in the cache section of the
> cnofig file, to be longer.
>
> If your 'individual' metatiles take mre than 30 seconds to render, you
> should bump this up.
>
> If your 'stuck lock' messages are occurring sooner than 30 seconds, then
> you probably have a bug. Patches welcome, in that case.
>
> -- Chris
>
> >
> > On Thu, Jan 8, 2009 at 11:23 AM, Christopher Schmidt <
> > crschmidt at metacarta.com> wrote:
> >
> > > On Thu, Jan 08, 2009 at 09:44:12AM -0800, Roger André wrote:
> > > > I'm curious why I'm seeing so many of these errors now?  I'm using
> > > Tilecache
> > > > against a MapServerLayer to seed my cache, and am getting these
> errors
> > > > whenever I try to view the web page at the same time as the seeding
> is
> > > > taking place.  This did not seem to be a problem when the layer was a
> WMS
> > > > one, and I wasn't using metatiling.
> > >
> > > MetaTiling is the *only* thing that uses locks. Without meta-tiling,
> > > locks would never happen.
> > >
> > > Regards,
> > > --
> > > Christopher Schmidt
> > > MetaCarta
> > >
>
> --
> Christopher Schmidt
> MetaCarta
> _______________________________________________
> Tilecache mailing list
> Tilecache at openlayers.org
> http://openlayers.org/mailman/listinfo/tilecache
>



-- 
Gissur Þórhallsson

Loftmyndir ehf.
Laugavegur 13
IS 101 Reykjavík - Iceland
sími (tel): (+354) 540 2500
tölvupóstur (email): gissur at loftmyndir.is
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/tilecache/attachments/20100623/d4d9fac6/attachment.html