1.x to 2.x I think has a fair amount of breaking changes and we shouldn't support it.

2.x to 5.x should be workable (https://www.elastic.co/guide/en/elasticsearch/reference/current/breaking-changes-5.0.html) but I would say 5.x is what we are officially supporting

On Wed, Apr 19, 2017 at 3:59 PM Chris Cormack <chrisc@catalyst.net.nz> wrote:
Hi Tomas

I think it is best to say 17.05 will support Elastic 5.0+
(Maybe 2.1 but I havent tested)

Definitely not 1.7

Chris

* Tomas Cohen Arazi (tomascohen@gmail.com) wrote:
>   Hi, I would like to ask what would the support status will be in 17.05 for
>   Elasticsearch 1.x (and maybe 2.x).
>
>   According to the official docs [1], 1.x is already deprecated, and 2.x
>   will be supported until 2018-02-28.
>   I propose deprecating ES 1.x support officially, and also remove it from
>   kohadevbox. Maybe something to discuss next dev meeting, but I suppose
>   there's no point supporting unsupported versions.
>   Regards
>   [1] https://www.elastic.co/support/eol
>   --
>   Tomás Cohen Arazi
>   Theke Solutions (https://theke.io)
>   â** +54 9351 3513384
>   GPG: B2F3C15F

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