Rails4生成elasticsearch错误 - 找不到geo_point，但在Development中工作

i have a fine running Rails 4 app using elastic search and searchkick.I have a geosearch by setting up geo_point and it works great in dev, but after deploying the same code and verifying the indices in production, on Digital Ocean with 3GB RAM and Ubuntu-16 OS, its failing with the error - i have a fine running Rails 4 app using elastic