[Mediawiki-l] Thumbnailer error on large file

[Dan Nessett]

On Sat, 22 May 2010 16:13:55 +0000, Dan Nessett wrote:

> On Sat, 22 May 2010 14:02:57 +0200, Platonides wrote:
> 
>> Dan Nessett wrote:
>>> To see what happens, I tried to convert the file manually from my
>>> command line prompt. The command I used was
>>> 
>>> convert -thumbnail 600x600
>>> 
International_Space_Station_Space_Shuttle_Atlantis_Sun_Transit_2010.png
>>> thumb.png
>>> 
>>> It worked perfectly.
>>> 
>>> Might there be a problem related to the long file name?
>> 
>> I don't think so.
>> 
>> Try increasing the values $wgMaxShellMemory, $wgMaxShellFileSize,
>> $wgMaxShellTime
>> 
>> You can also enable debug and look for the line doTransform:Running
>> custom convert command xxxx to find the exact command that is being
>> run.
> 
> Thanks. I will try all of these suggestions and report back.
> 
> However, I did some research and it appears there is a long-standing
> (over 3 years) bug that reports problems producing thumbnails for large
> png files (see https://bugzilla.wikimedia.org/show_bug.cgi?id=9497).
> This bug is still open, so it is possible I have run up against an
> unresolved problem.

I tried increasing the values of $wgMaxShellMemory and 
$wgMaxShellFileSize, first from 102400 to 409600 and then to 819200 
(these values are in KB). This did not fix the problem (our wiki is 
running 1.13.2, so $wgMaxShellTime is unavailable - it was introduced in 
1.14). No error message is produced, but the thumbnail is completely 
transparent with no visible content. So, it appears the bug I mentioned 
in a previous post is the culprit.

-- 
-- Dan Nessett