Cosmic] Eclipse fails to start (installed through : sudo apt install eclipse)

[Arnaud]

After installing Eclipse (), trying to start yields a popup with the following message (example) :
[beginning of message]
An error has occurred. See the log file
/home/arnaud/.eclipse/org.eclipse.platform_3.8_155965261/configuration/1543766365512.log
[end of message]

Each trial actually yields a different log file (with a different number in its name), but always with the same content, except for dates and hours in both first line which look like launch and error times respectively to me :
[beginning of file]
!SESSION Sun Dec 02 16:59:25 CET 2018 ------------------------------------------
!ENTRY org.eclipse.equinox.launcher 4 0 2018-12-02 16:59:25.532
!MESSAGE Exception launching the Eclipse Platform:
!STACK
java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:566)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:626)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
        at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
[end of file]

Installed JDK and JRE are default-jdk and defaut -jre respectively (currently openjdk-11-jdk and openjdk-11-jre, both for amd64), which satisfy the package depedencies.

It seems the Ubuntu Eclipse package is not configured according to the installed JDK/JRE packages, not even the default one it depends on. Its installation procedure doesn't seem to try to configure Eclipse accordingly.

Arnaud

[Hans Joachim Desserud (hjd)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1754886, so it is being marked as such.

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.