Puppet users - Nov 2014 - How best to use hiera for Java options? (with hash_merge)

Hi,

I've been using puppet for over a year now, but now I have a problem, and 
I'm not seeing a solution.
I have a hash to set up Java application servers in hiera, these get 
'deeper' merged so we don't need duplicate declarations of every
little
option.
Inside the manifest, the create_resources() function is called.

Now the problem here is that one of the options inside the hash is an array 
of Java options, such as heap size, the garbage collector, the OOM 
behaviour, etc.
Since arrays gets merged with hiera_hash in a 'deeper' merge, these
options
would be merged as wel.
The heap and permsize are actually already separate options, so they don't 
have this problem, but if I set '-XX:NewRatio=2' and I wan't to
override
this for some nodes or clusters, I would set it as '-XX:NewRatio=3', but
then this option is passed down twice, but with different values.

How to solve this? Does anyone else have any experience to share about this?

Regards,
Steven

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