Opened 12 years ago
#4192 new defect
libpng / IDAT CRC error when seeding tiles (CAIRO/PNG Driver)
| Reported by: | theram | Owned by: | tbonfort |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | MapCache | Version: | 6.0 |
| Severity: | normal | Keywords: | |
| Cc: |
Description
While using mapcache_seed to seed tiles from Mapserver, using CAIRO/PNG driver, mapcache_seed fails due to possible corrupt image returned from Mapserver.
Error:
libpng warning: Ignoring bad adaptive filter type libpng warning: Extra compressed data. libpng warning: Extra compression data. libpng 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 failed to setjmp(png_jmpbuf(png_ptr)) seeding tile 50 30 7
Switching Mapserver OUTPUTFORMAT to use AGG/PNG driver does not encounter the error.
Mapfile & mapcache.xml file attached.
mapcache_seed params that reproduces the error:
mapcache_seed -c /tmp/tb/png_error_mapcache.xml -t 2012-02-02_text_cache_nztm -g portalgridnztm1 -z 6,7
(reproducable at these zoom levels, error occurs at same tile each time: seeding tile 50 30 7)
Fonts & data sent to Thomas directly
mapfile