Thumbnails error

[Stefana Breitwieser]

Hi all,

I'm running into a thumbnails error. I'm trying to create thumbnails for a particular collection:

dspace filter-media -i 123456789/12345

This works for the vast majority of items. However, about 5% generate a pop-up window that Image Magick has stopped working. When you close the pop up it generates the error:

File: filename.pdf.jpg
ERROR filtering, skipping bitstream:

org.im4java.core.CommandException: org.im4java.core.CommandException: convert.exe: unable to open image `C\:Users\me\my\filepath'\file': No such file or directory @ error/blob.c/OpenBlob/2701.
org.im4java.core.CommandException: org.im4java.core.CommandException: convert.exe: unable to open image `C\:Users\me\my\filepath\file': No such file or directory @ error/blob.c/OpenBlob/2701.
        at org.im4java.core.ImageCommand.run(ImageCommand.java:219)
        at org.dspace.app.mediafilter.ImageMagickThumbnailFilter.getThumbnailFile(ImageMagickThumbnailFilter.java:126)
        at org.dspace.app.mediafilter.ImageMagickPdfThumbnailFilter.getDestinationStream(ImageMagickPdfThumbnailFilter.j
ava:25)
        at org.dspace.app.mediafilter.MediaFilterManager.processBitstream(MediaFilterManager.java:734)
        at org.dspace.app.mediafilter.MediaFilterManager.filterBitstream(MediaFilterManager.java:550)
        at org.dspace.app.mediafilter.MediaFilterManager.filterItem(MediaFilterManager.java:500)
        at org.dspace.app.mediafilter.MediaFilterManager.applyFiltersItem(MediaFilterManager.java:468)
        at org.dspace.app.mediafilter.MediaFilterManager.applyFiltersCollection(MediaFilterManager.java:446)
        at org.dspace.app.mediafilter.MediaFilterManager.main(MediaFilterManager.java:357)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.dspace.app.launcher.ScriptLauncher.runOneCommand(ScriptLauncher.java:226)
        at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:78)
Caused by: org.im4java.core.CommandException: convert.exe: unable to open image `C\:Users\me\my\filepath\file'': No such file or directory @ error/blob.c/OpenBlob/2701.
        at org.im4java.core.ImageCommand.finished(ImageCommand.java:253)
        at org.im4java.process.ProcessStarter.run(ProcessStarter.java:314)
        at org.im4java.core.ImageCommand.run(ImageCommand.java:215)
        ... 14 more

The error/blob.c/OpenBlob/2701 seems to relate to a permissions issue, but since it's successfully creating thumbnails for the majority of other files, I seem to have the correct permissions. The file path isn't overly long and I'm an administrator on our server. When I repeat the script, it's always the same files that generate the error every time. Any idea what might be happening here?

Additionally, because it generates the Windows pop-up error, I have to manually click "close program" every time for the script to continue. Is there a way to get it to fail more gracefully?

Thank you for any help you might have,

Stefana Breitwieser

Digital Archivist

Icahn School of Medicine at Mount Sinai

[Mark H. Wood]

On Tue, Jun 30, 2020 at 12:12:40PM -0700, Stefana Breitwieser wrote:
> Hi all,
>
> I'm running into a thumbnails error. I'm trying to create thumbnails for a
> particular collection:
>
> dspace filter-media -i 123456789/12345
> >
>
> This works for the vast majority of items. However, about 5% generate a
> pop-up window that Image Magick has stopped working. When you close the pop
> up it generates the error:
>
> File: filename.pdf.jpg
> > ERROR filtering, skipping bitstream:
> >
> > org.im4java.core.CommandException: org.im4java.core.CommandException:
> > convert.exe: unable to open image `C\:Users\me\my\filepath'\file': No such
> > file or directory @ error/blob.c/OpenBlob/2701.

[snip]

>
> The error/blob.c/OpenBlob/2701 seems to relate to a permissions issue, but
> since it's successfully creating thumbnails for the majority of other
> files, I seem to have the correct permissions. The file path isn't overly
> long and I'm an administrator on our server. When I repeat the script, it's
> always the same files that generate the error every time. Any idea what
> might be happening here?

I would check permissions throughout the assetstore, to see if a few
directories have different ownership or permissions. Running a
command-line tool as a user other than the DSpace user, for example,
can create files or directories in the assetstore that DSpace cannot
open.

--
Mark H. Wood
Lead Technology Analyst

University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu

[stefanabr...@gmail.com]

Thanks for your response, Mark. Do you know if how to check/update assetstore permissions is documented anywhere?

Stefana Breitwieser

Digital Archivist

Icahn School of Medicine at Mount Sinai

[Mark H. Wood]

On Tue, Jul 28, 2020 at 01:57:39PM -0700, stefanabr...@gmail.com wrote:
> Thanks for your response, Mark. Do you know if how to check/update
> assetstore permissions is documented anywhere?

I can't think of any place where this is documented, but it's really
simple: everything in and below [dspace]/assetstore (and any
additional assetstores that you may have) should be owned by the user
that runs Tomcat and should grant read/write permission to that user.

I ran a quick experiment on a test instance of DSpace. On this system
Tomcat is run by the user 'tomcat'. I am using GNU 'find'. This
command should list all files in 'assetstore' NOT owned by the user
'tomcat', *provided* that your current directory is the [dspace]
directory and the assetstore is a subdirectory named "assetstore":

find assetstore -not -user tomcat

This command should list all files under 'assetstore' that are not
read/write for the owner, regardless of other permissions:

find assetstore -not -perm -600

[Alan Orth]

Original poster is using Windows. Recursively change the permissions of the assetstore to your Windows user and try filter-media again.

Regards,

--
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[stefanabr...@gmail.com]

Thanks to you both for your help!