How do I change the number of replicas of multiple indexes in ElasticSearch 6.1 in Java

Question

My native language is not English, please forgive my typos. I have searched for the method to modify the index copy in the ES official document, but the corresponding method is only available after ES6.3, while my company uses ES6.1. I have also tried to find other materials, such as Google, but I did not get an effective solution, do you have a better method？Thank you.

Answer 1

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