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[Robert Lyon <robertl@xxxxxxxxxxxxxxx>]

** Changed in: mahara/15.04
    Milestone: 15.04.8 => 15.04.9

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https://bugs.launchpad.net/bugs/1269170

Title:
  GD Image not being created during cron run

Status in Mahara:
  Invalid
Status in Mahara 15.04 series:
  Confirmed
Status in Mahara 15.10 series:
  Invalid

Bug description:
  I get the following warnings when cron job 'cron_site_data_daily' runs
  - I'm not sure if it's specific to my data / machine / php version
  (which is 5.4) but I thought I'd mention them here in case others were
  having the same problems.

  The failure means that the statistic graphics are not generated.

  [WAR] 48 (lib/pear/Image/Canvas/GD/PNG.php:125) imagepng(): gd-png:  fatal libpng error: Wrote palette index exceeding num_palette
   Call stack (most recent first):
     * log_message("imagepng(): gd-png:  fatal libpng error: Wrote pal...", 8, true, true, "/mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php", 125) at /mnt/data/s16/lib/errors.php:430
     * error(2, "imagepng(): gd-png:  fatal libpng error: Wrote pal...", "/mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php", 125, array(size 1)) at Unknown:0
     * imagepng(resource(#8087), "/mnt/data/uploaddir/images/grouptypes.png") at /mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php:125
     * Image_Canvas_GD_PNG->save(array(size 1)) at /mnt/data/s16/lib/pear/Image/Graph.php:865
     * Image_Graph->_done(array(size 1)) at /mnt/data/s16/lib/pear/Image/Graph.php:787
     * Image_Graph->done(array(size 1)) at /mnt/data/s16/lib/registration.php:1164
     * group_type_graph() at /mnt/data/s16/lib/registration.php:2163
     * graph_site_data_daily() at /mnt/data/s16/lib/mahara.php:3009
     * cron_site_data_daily() at /mnt/data/s16/lib/cron.php:142
   
  [WAR] 48 (lib/pear/Image/Canvas/GD/PNG.php:125) imagepng(): gd-png error: setjmp returns error condition
   Call stack (most recent first):
     * log_message("imagepng(): gd-png error: setjmp returns error con...", 8, true, true, "/mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php", 125) at /mnt/data/s16/lib/errors.php:430
     * error(2, "imagepng(): gd-png error: setjmp returns error con...", "/mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php", 125, array(size 1)) at Unknown:0
     * imagepng(resource(#8087), "/mnt/data/uploaddir/images/grouptypes.png") at /mnt/data/s16/lib/pear/Image/Canvas/GD/PNG.php:125
     * Image_Canvas_GD_PNG->save(array(size 1)) at /mnt/data/s16/lib/pear/Image/Graph.php:865
     * Image_Graph->_done(array(size 1)) at /mnt/data/s16/lib/pear/Image/Graph.php:787
     * Image_Graph->done(array(size 1)) at /mnt/data/s16/lib/registration.php:1164
     * group_type_graph() at /mnt/data/s16/lib/registration.php:2163
     * graph_site_data_daily() at /mnt/data/s16/lib/mahara.php:3009
     * cron_site_data_daily() at /mnt/data/s16/lib/cron.php:142

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