add warning about copy_to in multi fields

elastic / elasticsearch-migration

This plugin will help you to check whether you can upgrade directly to the next major version of Elasticsearch, or whether you need to make changes to your data and cluster before doing so.

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add warning about copy_to in multi fields #43

Closed brwe closed 8 years ago

brwe commented 8 years ago

copy_to in multi fields has no effect anymore since 2.0 and we remove it completely in https://github.com/elastic/elasticsearch/pull/15213 . Would be good to get a warning here.

clintongormley commented 8 years ago

Given that these never worked, and creating a new index in 2.x throws an exception, I don't think there is anything to do here