Just came across the following post:
It mentions that 6.x high level rest java client will work with cluster running 7.x, as forward compatibility is guaranteed. However, I want to double confirm that if, for future release, will 7.x high level rest java client work for cluster running 8.x?
We are doing upgrade from 6.x to 7.x, and will need to do a shadow testing on the cluster running 7.x, while keeping 6.x client. We confirmed that 6.x client works for 7.x cluster, but not sure about future releases.
Thanks for the reply!