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From Markus Rathgeb <maggu2...@gmail.com>
Subject Re: Karaf: Java detection on Karaf
Date Tue, 05 Mar 2019 15:51:25 GMT
I assume you just need to create a file "/etc/gentoo-release" and mark
it readable for your user.

Am Di., 5. März 2019 um 16:49 Uhr schrieb Jean-Baptiste Onofré
<jb@nanthrax.net>:
>
> Hi Markus,
>
> you are right: I'm on Debian but not with java provided package.
>
> On my system, I manually installed java in /opt/java and define
> JAVA_HOME in /etc/profile.
>
> It seems in your case that JAVA_HOME is not considered. Let me try to
> reproduce playing with the env variables.
>
> Regards
> JB
>
> On 05/03/2019 16:35, Markus Rathgeb wrote:
> > Hi JBO,
> >
> >> I don't think java-config is used if you have JAVA_HOME defined right ?
> >> (it's what I have on my systems).
> >
> > You are using Gentoo / have a readable file "/etc/gentoo-release" and
> > you also did not install the system wide java support?
> > What a remarkable coincidence.
> >
> > I wonder why it is working on your system.
> > My reading of the scripts indicates the problem should exist in this
> > constellation.
> >
> > Please have a look at the output following information:
> >
> >
> > Here my current JAVA_HOME:
> > ===
> > $ echo $JAVA_HOME
> > /home/rathgeb/bin/pkgs/java/jdk/8/current
> > ===
> >
> > As you can see java is part of the PATH
> > ===
> > $ command -v java
> > /home/rathgeb/bin/pkgs/java/jdk/8/current/bin/java
> > ===
> >
> > The current java version is
> > ===
> > $ java -version
> > java version "1.8.0_202"
> > Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
> > Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)
> > ===
> >
> > Now let's start Karaf
> > ===
> > $ bin/karaf
> > /home/rathgeb/workspace/projects-oss/karaf/bin/apache-karaf-4.3.0-SNAPSHOT/bin/inc:
> > line 198: java-config: command not found
> > karaf: JAVA_HOME not set; results may vary
> > karaf: Enabling Java debug options:
> > -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
> > Listening for transport dt_socket at address: 5005
> >         __ __                  ____
> >        / //_/____ __________ _/ __/
> >       / ,<  / __ `/ ___/ __ `/ /_
> >      / /| |/ /_/ / /  / /_/ / __/
> >     /_/ |_|\__,_/_/   \__,_/_/
> >
> >   Apache Karaf (4.3.0-SNAPSHOT)
> >
> > Hit '<tab>' for a list of available commands
> > and '[cmd] --help' for help on a specific command.
> > Hit '<ctrl-d>' or type 'system:shutdown' or 'logout' to shutdown Karaf.
> >
> > karaf@root()>
> > ===
> >
> > You see the message
> > ===
> > /home/rathgeb/workspace/projects-oss/karaf/bin/apache-karaf-4.3.0-SNAPSHOT/bin/inc:
> > line 198: java-config: command not found
> > ===
> >
> > So, please have a look at:
> > https://github.com/apache/karaf/blob/8c3dda1/assemblies/features/base/src/main/filtered-resources/resources/bin/inc#L187-L217
> >
> > ===
> > if [ "x${JAVA}" = "x" ] && [ -r /etc/gentoo-release ] ; then
> >     JAVA_HOME=$(java-config --jre-home)
> > fi
> > ===
> >
> > If the environment JAVA is not set (AFAIK this is not a commonly used
> > one) and there is a readable "/etc/gentoo-release" file, JAVA_HOME is
> > set by using "java-config" -- regardless if the tool is present.
> >
> > The "locateJava" method is called by e.g. the init method of Karaf.
> >
> >
> >
> >> but you can define JAVA_HOME in bin/inc right ?
> >
> > Sure, I can modify "bin/inc" all the time I unpack the official distribution.
> > But is this what you would like to tell users?
> > e.g. "If you unpack the official distribution and use Gentoo without
> > "java-config" present, please edit the "bin/inc" file in front of
> > starting karaf."
> > I don't think this is nice if we could modify the script so no
> > interaction is necessary.
> >
>
> --
> Jean-Baptiste Onofré
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com

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