[mapserver-users] Mapcache Seed / libpng error?

[Andrew Cowie]

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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