Bug#896907: openjdk-8-jre-headless: Headless JRE package should not configure assistive technologies
On Wed, 25 Apr 2018, Mark Waite wrote:
> Java assistive
> technologies should be disabled in the *-headless package so that
> components do not mistakenly believe assistive technologies might work.
I’m not sure this is technically possible; this is a conffile,
so we cannot, from a packaging PoV, have different configurations
depending on which packages are installed.
> The openjdk-8-jre-headless package intentionally excludes user interface
> related components, but the package mistakenly enables Java assistive
> technologies which require user interface components.
On the other hand, these components probably fall under “need the
nōn-headless JRE” anyway. Here, “headless” does not mean “doesn’t
have a display attached locally” but “omits stuff for graphics”.
If your library uses graphics, chances are it needs the full JRE,
including its dependencies.
That being said, openjdk-11 currently doesn’t enable assistive
technologies at all (because they don’t work — not because of
things like this; expect them to be enabled once they work).
> The Docker
> image description says:
> This image installs the -headless package of OpenJDK and so is missing
> many of the UI-related Java libraries and some common packages contained
There you have it. You’ll need to add the full JRE.
> While using Jenkins based on the jenkins/jenkins:slim image, charts and
> graphs are not drawn because JFreeChart fails to initialize. JFreeChart
> fails to initialize because Java assistive technologies are enabled,
> but not installed.
This sounds like something fixable in JFreeChart. Is this the same
I see packaged as libjfreechart-java in Debian? Do you have some
small reproducer for the “JFreeChart fails to initialise” problem
I can run to test this?
Thanks in advance,
Sometimes they [people] care too much: pretty printers [and syntax highligh-
ting, d.A.] mechanically produce pretty output that accentuates irrelevant
detail in the program, which is as sensible as putting all the prepositions
in English text in bold font. -- Rob Pike in "Notes on Programming in C"