Solve the problem of slow response speed when one of the servers hangs down when nginx is doing load balancing

Solve the problem of slow response speed when one of the servers hangs down when nginx is doing load balancing

Reference article:

(1) Solve the problem of slow response speed when one of the servers hangs down when nginx is doing load balancing

（2） https://www.cnblogs.com/netcorner/p/7209685.html

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