cgspace-notes/content/posts/2018-12.md

---
title: "December, 2018"
date: 2018-12-02T02:09:30+02:00
author: "Alan Orth"
tags: ["Notes"]
---

## 2018-12-01

- Switch CGSpace (linode18) to use OpenJDK instead of Oracle JDK
- I manually installed OpenJDK, then removed Oracle JDK, then re-ran the [Ansible playbook](http://github.com/ilri/rmg-ansible-public) to update all configuration files, etc
- Then I ran all system updates and restarted the server

## 2018-12-02

- I noticed that there is another issue with PDF thumbnails on CGSpace, and I see there was another [Ghostscript vulnerability last week](https://usn.ubuntu.com/3831-1/)

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- The error when I try to manually run the media filter for one item from the command line:

```
org.im4java.core.InfoException: org.im4java.core.CommandException: org.im4java.core.CommandException: identify: FailedToExecuteCommand `"gs" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72" -dFirstPage=1 -dLastPage=1 "-sOutputFile=/tmp/magick-12989PcFN0DnJOej7%d" "-f/tmp/magick-129895Bmp44lvUfxo" "-f/tmp/magick-12989C0QFG51fktLF"' (-1) @ error/delegate.c/ExternalDelegateCommand/461.
org.im4java.core.InfoException: org.im4java.core.CommandException: org.im4java.core.CommandException: identify: FailedToExecuteCommand `"gs" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72" -dFirstPage=1 -dLastPage=1 "-sOutputFile=/tmp/magick-12989PcFN0DnJOej7%d" "-f/tmp/magick-129895Bmp44lvUfxo" "-f/tmp/magick-12989C0QFG51fktLF"' (-1) @ error/delegate.c/ExternalDelegateCommand/461.
        at org.im4java.core.Info.getBaseInfo(Info.java:360)
        at org.im4java.core.Info.<init>(Info.java:151)
        at org.dspace.app.mediafilter.ImageMagickThumbnailFilter.getImageFile(ImageMagickThumbnailFilter.java:142)
        at org.dspace.app.mediafilter.ImageMagickPdfThumbnailFilter.getDestinationStream(ImageMagickPdfThumbnailFilter.java:24)
        at org.dspace.app.mediafilter.FormatFilter.processBitstream(FormatFilter.java:170)
        at org.dspace.app.mediafilter.MediaFilterManager.filterBitstream(MediaFilterManager.java:475)
        at org.dspace.app.mediafilter.MediaFilterManager.filterItem(MediaFilterManager.java:429)
        at org.dspace.app.mediafilter.MediaFilterManager.applyFiltersItem(MediaFilterManager.java:401)
        at org.dspace.app.mediafilter.MediaFilterManager.main(MediaFilterManager.java:237)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.dspace.app.launcher.ScriptLauncher.runOneCommand(ScriptLauncher.java:226)
        at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:78)
```

- A comment on [StackOverflow question](https://stackoverflow.com/questions/53560755/ghostscript-9-26-update-breaks-imagick-readimage-for-multipage-pdf) from yesterday suggests it might be a bug with the `pngalpha` device in Ghostscript and [links to an upstream bug](https://bugs.ghostscript.com/show_bug.cgi?id=699815)
- I think we need to wait for a fix from Ubuntu
- For what it's worth, I get the same error on my local Arch Linux environment with Ghostscript 9.26:

```
$ gs -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 -sDEVICE=pngalpha -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r72x72 -dFirstPage=1 -dLastPage=1 -sOutputFile=/tmp/out%d -f/home/aorth/Desktop/Food\ safety\ Kenya\ fruits.pdf
DEBUG: FC_WEIGHT didn't match
zsh: segmentation fault (core dumped)  gs -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000
```

- When I replace the `pngalpha` device with `png16m` as suggested in the StackOverflow comments it works:

```
$ gs -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 -sDEVICE=png16m -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r72x72 -dFirstPage=1 -dLastPage=1 -sOutputFile=/tmp/out%d -f/home/aorth/Desktop/Food\ safety\ Kenya\ fruits.pdf
DEBUG: FC_WEIGHT didn't match
```

- Start proofing the latest round of 226 IITA archive records that Bosede sent last week and Sisay uploaded to DSpace Test this weekend ([IITA_Dec_1_1997 aka Daniel1807](https://dspacetest.cgiar.org/handle/10568/108298))
  - One item missing the authorship type
  - Some invalid countries (smart quotes, mispellings)
  - Added countries to some items that mentioned research in particular countries in their abstracts
  - One item had "MADAGASCAR" for ISI Journal
  - Minor corrections in IITA subject (LIVELIHOOD→LIVELIHOODS)
  - Trim whitespace in abstract field
  - Fix some sponsors (though some with "Governments of Canada" etc I'm not sure why those are plural)
  - Eighteen items had `en||fr` for the language, but the content was only in French so changed them to just `fr`
  - Six items had encoding errors in French text so I will ask Bosede to re-do them carefully
  - Correct and normalize a few AGROVOC subjects
- Expand my "encoding error" detection GREL to include `~` as I saw a lot of that in some copy pasted French text recently:

```
or(
  isNotNull(value.match(/.*\uFFFD.*/)),
  isNotNull(value.match(/.*\u00A0.*/)),
  isNotNull(value.match(/.*\u200A.*/)),
  isNotNull(value.match(/.*\u2019.*/)),
  isNotNull(value.match(/.*\u00b4.*/)),
  isNotNull(value.match(/.*\u007e.*/))
)
```

## 2018-12-03

- I looked at the DSpace Ghostscript issue more and it seems to only affect certain PDFs...
- I can successfully generate a thumbnail for another recent item ([10568/98394](https://hdl.handle.net/10568/98394)), but not for [10568/98930](https://hdl.handle.net/10568/98390)
- Even manually on my Arch Linux desktop with ghostscript 9.26-1 and the `pngalpha` device, I can generate a thumbnail for the first one (10568/98394):

```
$ gs -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 -sDEVICE=pngalpha -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r72x72 -dFirstPage=1 -dLastPage=1 -sOutputFile=/tmp/out%d -f/home/aorth/Desktop/Info\ Note\ Mainstreaming\ gender\ and\ social\ differentiation\ into\ CCAFS\ research\ activities\ in\ West\ Africa-converted.pdf
```

- So it seems to be something about the PDFs themselves, perhaps related to alpha support?
- The first item (10568/98394) has the following information:

```
$ identify Info\ Note\ Mainstreaming\ gender\ and\ social\ differentiation\ into\ CCAFS\ research\ activities\ in\ West\ Africa-converted.pdf\[0\]
Info Note Mainstreaming gender and social differentiation into CCAFS research activities in West Africa-converted.pdf[0]=>Info Note Mainstreaming gender and social differentiation into CCAFS research activities in West Africa-converted.pdf PDF 595x841 595x841+0+0 16-bit sRGB 107443B 0.000u 0:00.000
identify: CorruptImageProfile `xmp' @ warning/profile.c/SetImageProfileInternal/1746.
```

- And wow, I can't even run ImageMagick's `identify` on the first page of the second item (10568/98930):

```
$ identify Food\ safety\ Kenya\ fruits.pdf\[0\]
zsh: abort (core dumped)  identify Food\ safety\ Kenya\ fruits.pdf\[0\]
```

- But with GraphicsMagick's `identify` it works:

```
$ gm identify Food\ safety\ Kenya\ fruits.pdf\[0\]
DEBUG: FC_WEIGHT didn't match
Food safety Kenya fruits.pdf PDF 612x792+0+0 DirectClass 8-bit 1.4Mi 0.000u 0m:0.000002s
```

- Interesting that ImageMagick's `identify` *does* work if you do not specify a page, perhaps as [alluded to in the recent Ghostscript bug report](https://bugs.ghostscript.com/show_bug.cgi?id=699815):

```
$ identify Food\ safety\ Kenya\ fruits.pdf
Food safety Kenya fruits.pdf[0] PDF 612x792 612x792+0+0 16-bit sRGB 64626B 0.010u 0:00.009
Food safety Kenya fruits.pdf[1] PDF 612x792 612x792+0+0 16-bit sRGB 64626B 0.010u 0:00.009
Food safety Kenya fruits.pdf[2] PDF 612x792 612x792+0+0 16-bit sRGB 64626B 0.010u 0:00.009
Food safety Kenya fruits.pdf[3] PDF 612x792 612x792+0+0 16-bit sRGB 64626B 0.010u 0:00.009
Food safety Kenya fruits.pdf[4] PDF 612x792 612x792+0+0 16-bit sRGB 64626B 0.010u 0:00.009
identify: CorruptImageProfile `xmp' @ warning/profile.c/SetImageProfileInternal/1746.
```

- As I expected, ImageMagick cannot generate a thumbnail, but GraphicsMagick can (though it looks like crap):

```
$ convert Food\ safety\ Kenya\ fruits.pdf\[0\] -thumbnail 600x600 -flatten Food\ safety\ Kenya\ fruits.pdf.jpg
zsh: abort (core dumped)  convert Food\ safety\ Kenya\ fruits.pdf\[0\] -thumbnail 600x600 -flatten
$ gm convert Food\ safety\ Kenya\ fruits.pdf\[0\] -thumbnail 600x600 -flatten Food\ safety\ Kenya\ fruits.pdf.jpg
DEBUG: FC_WEIGHT didn't match
```

- I inspected the troublesome PDF using [jhove](http://jhove.openpreservation.org/) and noticed that it is using `ISO PDF/A-1, Level B` and the other one doesn't list a profile, though I don't think this is relevant

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