记录一次 gateway 网关 FluxOnAssembly$OnAssemblyException 异常 报错经历

报错代码：

java.lang.IllegalStateException: Invalid host: lb://zhihui_member
	at org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.filter(RouteToRequestUrlFilter.java:86) ~[spring-cloud-gateway-server-2.2.9.RELEASE.jar:2.2.9.RELEASE]
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ springfox.boot.starter.autoconfigure.SwaggerUiWebFluxConfiguration$CustomWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.web.cors.reactive.CorsWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ HTTP POST "/api/member/zhihuimember/list" [ExceptionHandlingWebHandler]
Stack trace:
		at org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.filter(RouteToRequestUrlFilter.java:86) ~[spring-cloud-gateway-server-2.2.9.RELEASE.jar:2.2.9.RELEASE]

排查后发现：

	if ("lb".equalsIgnoreCase(routeUri.getScheme()) && routeUri.getHost() == null) {
			// Load balanced URIs should always have a host. If the host is null it is
			// most
			// likely because the host name was invalid (for example included an
			// underscore)
			throw new IllegalStateException("Invalid host: " + routeUri.toString());
}

上面的别人说的很清楚可能是下划线回去看代码

lb://zhihui_member

果然是

解决方案：

lb://zhihui-member