Prioritise health checks in ES cluster to prevent nodes falling out


I have a 30 node cluster. Occasionally, I encounter searches that spams the cluster, causing health checks to fail. I see errors like "SERVICE_UNAVAILABLE/2/no master]" and my coordinating node falls out of the cluster

I was wondering if there is any setting to prioritise health checking threads so that there is more resiliency

What version are you running?
What is the output from the _cluster/stats?pretty&human API?

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