Where is java_home detected from by the installer?

[Jon Agland]

Hi Dave,

My experience is that it will detect the location from the OS
environment [after all you have to setup JAVA_HOME 'System Variable' on
Windows]

Just looking at two *nix systems that I have access to [Ubuntu and
RHEL]

In both cases putting an executable script like 'java.sh' (remember to
chmod +x) into /etc/profile.d would seem to work.   

JAVA_HOME=/path/to/java
export JAVA_HOME

You could test this by executing the above command line before
installing, but it will likely be lost after reboot/new shell session
etc...

Also worth noting that Tomcat appears to be able to have JAVA_HOME
defined in the startup configuration [it was in /etc/default/tomcat8 on
Ubuntu and /etc/sysconfig/tomcat on RHEL]

If you set it in Tomcat (or Jetty), then I suspect you could have
issues using the command line tools in /bin such as aacli.sh and
status.sh, so I'd check if setting via profile.d is possible first... 

Cheers,

Jon


Jon Agland
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On Mon, 2017-07-17 at 11:31 +0000, Dave Perry wrote:
> Where does JAVA_HOME get detected from by the installer?
> I updated java (removed old version, installed new one) on SLES 11,
> went fine, then ran the Shibboleth upgrade script and it complained
> that the path for java_home didn’t work. It still has the old version
> in.
>  
> I’ve edited /etc/profile.local to have the correct path (someone
> advised putting /usr/java/latest, which links to it automatically)
> but it still is asking for the old version specifically.
>  
> I can’t see from the code where it’s being a detected. A reboot
> doesn’t seem to have fixed it either.
>  
> Thanks,
> Dave
>  
>  
> _________________________________________________
> Dave Perry
> eLearning Technologist, Hull College Group (Monday – Thursday)
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