Sean
    
    Thanks for the pointers.
    
    Janino specifically says it only requires a JRE - 
https://janino-compiler.github.io/janino/#requirements
    
    As for scalac can't find a specific reference anywhere, appears to be 
self-contained AFAICT
    
    Rob
    
    On 17/04/2019, 18:56, "Sean Owen" <sro...@gmail.com> wrote:
    
        I confess I don't know, but I don't think scalac or janino need javac
        and related tools, and those are the only things that come to mind. If
        the tests pass without a JDK, that's good evidence.
        
        On Wed, Apr 17, 2019 at 8:49 AM Rob Vesse <rve...@dotnetrdf.org> wrote:
        >
        > Folks
        >
        >
        >
        > For those using the Kubernetes support and building custom images are 
you using a JDK or a JRE in the container images?
        >
        >
        >
        > Using a JRE saves a reasonable chunk of image size (about 50MB with 
our preferred Linux distro) but I didn’t want to make this change if there was 
a reason to have a JDK available.  Certainly the official project integration 
tests run just fine with a JRE based image
        >
        >
        >
        > Currently the projects official Docker files use openjdk:8-alpine as 
a base which includes a full JDK so didn’t know if that was intentional or just 
convenience?
        >
        >
        >
        > Thanks,
        >
        >
        >
        > Rob
        
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