[mapserver-users] Mapcache Seed / libpng error?

[Andrew Cowie]

Ticket created:

http://trac.osgeo.org/mapserver/ticket/4192


-----Original Message-----
From: thomas bonfort [mailto:thomas.bonfort at gmail.com]
Sent: Wednesday, 15 February 2012 10:43 p.m.
To: Andrew Cowie
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Mapcache Seed / libpng error?

Is the error always reproducible ?
From the logs it seems that the png data received by mapcache from the
wms server is corrupt. More investigation would be needed to determine
if the network or the wms server is at fault for this.

regards,

--
thomas

On Wed, Feb 15, 2012 at 04:45, Andrew Cowie
<CowieA at landcareresearch.co.nz> wrote:
> Hello List,
>
>
>
> We’ve been using mapcache_seed ( mapcache SVN checkout 13002 ) to build our
> caches mostly successfully so far, but recently have come up against an
> error which has only cropped up with a certain layer which includes our text
> & labels
>
>
>
> www-data at server$ ./mapcache_seed -c /opt/mapserver/mapcache/oe_mapcache.xml
> -t 2012-02-02_text_cache_nztm  -g portalgridnztm1 -z 7,8
>
> found old lockfile /tmp/_gc_lock9-175-1233-slope_cache_nztm.lck, deleting it
>
> found old lockfile /tmp/_gc_lock7-7-9-2012-02-02_text_cache_nztm.lck,
> deleting it
>
> found old lockfile /tmp/_gc_lock9-136-179-terr_auth_cache_nztm.lck, deleting
> it
>
> found old lockfile /tmp/_gc_lock9-138-86-wards_cache_nztm.lck, deleting it
>
> seeding tile 65 25 7libpng error: IDAT: CRC error
>
> failed to setjmp(png_jmpbuf(png_ptr))
>
> failed to load image data from metatile
>
> failed to setjmp(png_jmpbuf(png_ptr))
>
> failed to load image data from metatile
>
> seeding tile 130 50 8
>
> www-data at server$
>
>
>
> or...
>
>
>
> www-data at server$ ./mapcache_seed -c /opt/mapserver/mapcache/oe_mapcache.xml
> -t 2012-02-02_text_cache_nztm  -g portalgridnztm1 -z 6,7
>
> found old lockfile /tmp/_gc_lock9-137-51-terr_auth_cache_nztm.lck, deleting
> it
>
> found old lockfile /tmp/_gc_lock9-182-1201-slope_cache_nztm.lck, deleting it
>
> found old lockfile /tmp/_gc_lock9-138-197-wards_cache_nztm.lck, deleting it
>
> seeding tile 25 15 6libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng warning: Ignoring bad adaptive filter type
>
> libpng error: IDAT: CRC error
>
> failed to setjmp(png_jmpbuf(png_ptr))
>
> failed to load image data from metatile
>
> seeding tile 50 35 7failed to setjmp(png_jmpbuf(png_ptr))
>
> failed to load image data from metatile
>
> www-data at server$
>
>
>
>
>
> The next step will be to checkout the latest SVN version. But we are
> currently mid-build with some other layers, so are waiting for them to
> finish before we do that. But thought  we’d fire it out to the list to see
> if anyone has any ideas as to what might be causing this?
>
>
>
>
>
> Below is the mapcache config:
>
>
>
>    <source name="src_text_update" type="wms">
>
>       <http>
>
>          <url>http://server/cgi-bin/mapserv601?</url>
>
>       </http>
>
>       <getmap>
>
>          <params>
>
>             <FORMAT>image/png</FORMAT>
>
>             <LAYERS>text</LAYERS>
>
>             <MAP>/opt/mapserver/mapfiles/m6scenz_topo_new.map</MAP>
>
>             <TRANSPARENT>true</TRANSPARENT>
>
>          </params>
>
>       </getmap>
>
>    </source>
>
>
>
>    <tileset name="2012-02-02_text_cache_nztm">
>
>       <source>src_text_update</source>
>
>       <cache>disk</cache>
>
>       <format>PNG</format>
>
>       <grid>portalgridnztm1</grid>
>
>       <metatile>5 5</metatile>
>
>       <metabuffer>10</metabuffer>
>
>    </tileset>
>
>
>
>
>
> "labelcache_map_edge_buffer"                    "-10"    is set in mapserver
> WEB METADATA
>
>
>
>
>
> Cheers
>
>
>
>
>
> Andrew
>
>
>
>
>
>
>
>
>
>
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The views expressed in this email may not be those of Landcare Research New Zealand Limited. http://www.landcareresearch.co.nz