[Solved] gateway Error: reactor.core.Exceptions$ErrorCallbackNotImplemented

The production environment is fine, but suddenly all front-end requests are cross-domain and the requests are 500. gateway reports an error.
reactor.core.Exceptions$ErrorCallbackNotImplemented:java.lang.IndexOutOfBoundsException: Index: 0, Size: 0. All interfaces are reported.
The reason is that the gateway also integrates with springboot-admin, which opens the actuator endpoint of the application, leading to a code injection attack

Solution: Use nginx to intercept the path directly, add the following configuration to conf, and reload nginx.

location /actuator {
    return 404;


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