Dear DSpace people,

Recently I noticed that our PDFs were not getting thumbnails generated for
them. I ran the filter-media script manually and saw an error like this:

org.im4java.core.InfoException: org.im4java.core.CommandException:
org.im4java.core.CommandException: identify: not authorized
`/tmp/impdfthumb5039464037201498062.pdf' @ error/constitute.c/ReadImage/412.

According to an Ubuntu Security Notice from 2018-10 the Ubuntu developers
have decided to disable PDF processing by default in their ImageMagick[0]
package. This affects all currently supported Ubuntu long-term support
releases.

If you are using DSpace 5.x or 6.x with ImageMagick thumbnail support, you
will need to change your system's ImageMagick policy.xml file to re-enable
PDF processing. On Ubuntu 16.04 the file is /etc/ImageMagick-6/policy.xml.
Delete or comment out the following line:

<policy domain="coder" rights="none" pattern="PDF" />

Regards,

[0] https://usn.ubuntu.com/3785-1/
-- 
Alan Orth
[email protected]
https://picturingjordan.com
https://englishbulgaria.net
https://mjanja.ch
"In heaven all the interesting people are missing." ―Friedrich Nietzsche

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