Bug#934111: jython: add explicit dependency on openjdk-11-jre-headless

[Emmanuel Bourg]

Hi Andreas,

Le 07/08/2019 à 08:08, Andreas Beckmann a écrit :

> in order to fix some upgrade issues from stretch to buster due to the
> dependency cycle between default-jre-headless, openjdk-11-jre-headless
> and ca-certificates-java (#929685), please add an explicit dependency on
> openjdk-11-jre-headless to jython as a workaround.

Could you elaborate a bit on the upgrade issue you encountered? It looks
a bit arbitrary to change the JRE dependency on jython to work around
the ca-certificates-java dependency cycle, and not on the other
applications depending on the JRE.


> I'm attaching a patch and the piuparts log showing the failure.
> The relevant diff of the upgrade test with the fixed package available
> is:
> 

> @@ -22494,23 +22486,6 @@
>    Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.resolve1.conf ...^M
>    Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.systemd1.conf ...^M
>    Removing obsolete conffile /etc/dbus-1/system.d/org.freedesktop.timedate1.conf ...^M
> -  Setting up jython-stilts (3.1.5-1) ...^M
> -  Exception in thread "main" java.lang.NoSuchMethodError: java.nio.ByteBuffer.clear()Ljava/nio/ByteBuffer;^M
> -       at org.python.core.io.BufferedReader.clear(BufferedReader.java:147)^M
> -       at org.python.core.io.BufferedReader.<init>(BufferedReader.java:27)^M

How did you get this exception? This was triggered by running Java 11
compiled code on Java 8, it's another issue we have to fix.

Emmanuel Bourg