I'm trying to apply image effects (curled shadow, in this case) to a 600x428px 600KB JPEG, and after selecting the effect, the spinner comes up, but never completes. Looking at top (this is Confluence 4.3 running on Ubuntu 12.04), there is a flurry of activity for about one second, then that is it, the java process just sits there at 0% CPU utilisation.
I've been able to apply the same image effect to small images without problem, so I'm wondering if there's a maximum size of image that the effects can handle?
There is actually a hard limit in place for this, that should show an error when you try to apply effects to images over 2,000 square pizels in size. It should look like this:
The image's dimensions are too large to apply effects. The width and height must be under 2000 pixels.
a 600x428px image should be fine - check you JVM settings and logs to make sure there aren't any errors. Contact our support team if you're having trouble. http://support.atlassian.com'
Checking /var/atlassian/application-data/confluence/logs/atlassian-confluence.log gives me the following error (trimming off the enormous call stack):
2012-09-07 17:13:37,018 ERROR [http-8090-5] [[Standalone].[localhost].[/].[file-server]] log Servlet.service() for servlet file-server threw exception java.lang.IllegalArgumentException: Numbers of source Raster bands and source color space components do not match at java.awt.image.ColorConvertOp.filter(Unknown Source)
which suggests that Confluence doesn't like my image. I tried opening the original image in Paint.NET, saving it again, and replacing the image on the wiki, but that made not difference. I then tried copying and pasting the image into a new image in Paint.NET and saving it, and this time the image effects applied correctly.
FWIW I just noticed that the image thumbnailer wasn't generating images before either, but with the updated image, thumbnails were generated OK.
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