scilab fails to start missing java-8-oracle

[Mark]

This is for updated Ubuntu 18.04,

I have installed scilab package,

Problem: hardcoded java-8-oracle somewhere, installation goes ok, when I run scilab
```
$ scilab
Cannot find /usr/lib/jvm/java-8-oracle/bin/java
```

I have only openjdk-11-jre (which is Bionic default) installed.

Workaround:
add symlink to default-java
```
cd /usr/lib/jvm
/usr/lib/jvm# ln -s default-java java-8-oracle
```

Correct fix:
in scripts use default-java instead of java-8-oracle.

Sorry, I was not able to find which line is failing with the hardcoded path.

Thank you,
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: KDE
DistroRelease: KDE neon 18.04
InstallationDate: Installed on 2012-12-23 (2380 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
Package: scilab 6.0.1-7ubuntu1~18.04.1 [origin: Ubuntu]
PackageArchitecture: all
ProcVersionSignature: Ubuntu 5.0.0-20.21~18.04.1-generic 5.0.8
Tags: third-party-packages bionic wayland-session
Uname: Linux 5.0.0-20-generic x86_64
UnreportableReason: Toto není oficiální KDE balík. Prosíme odstraňte všechny balíky třetích stran a zkuste to znovu.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm libvirtd lpadmin netdev plugdev sudo video
_MarkForUpload: True

[Tiago Stürmer Daitx (tdaitx)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please run

$ apport-collect 1834265

After that please run the following commands and paste the output here:

 1. dpkg -l '*openjdk*' '*oracle*'
 2. update-java-alternatives -l
 3. java -version

[Mark (markthecodehamster)]

apport information

[Mark (markthecodehamster)]

apport information

[Mark (markthecodehamster)]

apport information

[Mark (markthecodehamster)]

$ LANG=C dpkg -l '*openjdk*' '*oracle*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=========================================-=========================-=========================-=======================================================================================
un openjdk-11-jdk-headless <none> <none> (no description available)
ii openjdk-11-jre:amd64 11.0.3+7-1ubuntu2~18.04.1 amd64 OpenJDK Java runtime, using Hotspot JIT
ii openjdk-11-jre-headless:amd64 11.0.3+7-1ubuntu2~18.04.1 amd64 OpenJDK Java runtime, using Hotspot JIT (headless)
un openjdk-6-jre <none> <none> (no description available)
un openjdk-6-jre-headless <none> <none> (no description available)
un openjdk-7-jdk <none> <none> (no description available)
un openjdk-7-jre <none> <none> (no description available)
un openjdk-7-jre-headless <none> <none> (no description available)
un openjdk-8-jdk <none> <none> (no description available)
un openjdk-8-jdk-headless <none> <none> (no description available)
un openjdk-8-jre <none> <none> (no description available)
rc openjdk-8-jre-headless:amd64 8u212-b03-0ubuntu1.18.04. amd64 OpenJDK Java runtime, using Hotspot JIT (headless)
in openjdk-9-jdk:amd64 <none> amd64 (no description available)
rc openjdk-9-jre-headless:amd64 9~b114-0ubuntu1 amd64 OpenJDK Java runtime, using Hotspot JIT (headless)
un oracle-java11-installer <none> <none> (no description available)
un oracle-java6-set-default <none> <none> (no description available)
un oracle-java7-bin <none> <none> (no description available)
un oracle-java7-fonts <none> <none> (no description available)
un oracle-java7-jdk <none> <none> (no description available)
un oracle-java7-jre <none> <none> (no description available)
un oracle-java7-plugin <none> <none> (...

[Mark (markthecodehamster)]

$ LANG=C update-java-alternatives -l
java-1.11.0-openjdk-amd64 1111 /usr/lib/jvm/java-1.11.0-openjdk-amd64

[Mark (markthecodehamster)]

$ java -version
openjdk version "11.0.3" 2019-04-16
OpenJDK Runtime Environment (build 11.0.3+7-Ubuntu-1ubuntu218.04.1)
OpenJDK 64-Bit Server VM (build 11.0.3+7-Ubuntu-1ubuntu218.04.1, mixed mode, sharing)

[Mark (markthecodehamster)]

H Tiago, I've updated the bug.

I also did:
apt purge .. to remove the rc statuses for java in command 1.
then apt remove --purge openjdk* scilab* //to start anew
When I install scilab, it pulls openjdk-11-jre but issue with oracle-java still remains

Thanks for looking into this!

[Launchpad Janitor (janitor)]

[Expired for scilab (Ubuntu) because there has been no activity for 60 days.]

[Mark (markthecodehamster)]

The bug has been marked as expired due to no response from the maintainer, reopening as new.

[Tiago Stürmer Daitx (tdaitx)]

Please run scilab with full debugging enabled and paste (or attach) the full output in this bug. In order to do so, run the following command in a terminal:

$ bash -x /usr/bin/scilab

Also, I noticed that your original report mentioned that you linked default-java to java-8-oracle. This should not be necessary as you have default-jre-headless installed and it should have created the /usr/lib/jvm/default-java by itself. So please check that /usr/lib/jvm/default-java is correctly linked to openjdk-11 directory - if it is not, please remove the manually created link and reinstall the default-jre-headless package.

$ ls -l /usr/lib/jvm/default-java
/usr/lib/jvm/default-java -> java-1.11.0-openjdk-amd64

And it should belong to default-jre-headless:

$ dpkg -S /usr/lib/jvm/default-java
default-jre-headless: /usr/lib/jvm/default-java

[Launchpad Janitor (janitor)]

[Expired for scilab (Ubuntu) because there has been no activity for 60 days.]