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Setting this for the new major version gives us a nice
clean break for model state compatibility. Model snapshots
generated by 8.0 will not be loadable by 7.x nodes, and
in the version where we eventually stop supporting upgrades
from 7.x to the latest version we'll be able to remove all
the model state backwards compatibility code related to
version 7.x.

Backport of #2139

Setting this for the new major version gives us a nice
clean break for model state compatibility.  Model snapshots
generated by 8.0 will not be loadable by 7.x nodes, and
in the version where we eventually stop supporting upgrades
from 7.x to the latest version we'll be able to remove all
the model state backwards compatibility code related to
version 7.x.

Backport of elastic#2139
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@edsavage edsavage left a comment

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LGTM

@droberts195 droberts195 merged commit 19897f1 into elastic:8.0 Nov 25, 2021
@droberts195 droberts195 deleted the increment_model_state_version_80 branch November 25, 2021 13:04
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2 participants