ES cluster restart, any impact on Logstash output?

We need to restart ES cluster (node by node) due to some changes.
Our concenr is to know whether it will have any impact on LS.
We have mentioned ES-output to logstash using hosts uri.

It is said that it will load balance the array of elastic hosts.
Please clarify whether it will be OK to restart ES cluster without stopping Logstash?


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