[2022-10-17 10:43:29,455] [reactor-http-nio-8] [WARN ] r.netty.http.client.HttpClientConnect 294 -- [] [id: 0x07295210, L:/192.168.0.162:60388 - R:/192.168.0.162:9087] The connection observed an error
java.io.IOException: 你的主机中的软件中止了一个已建立的连接。
	at sun.nio.ch.SocketDispatcher.read0(Native Method)
	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
	at sun.nio.ch.IOUtil.read(IOUtil.java:192)
	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
	at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1134)
	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)
[2022-10-17 10:43:29,455] [reactor-http-nio-8] [ERROR] o.s.b.a.w.r.e.AbstractErrorWebExceptionHandler 122 -- [] [667422d3]  500 Server Error for HTTP POST "接口路径"
java.io.IOException: 你的主机中的软件中止了一个已建立的连接。
	at sun.nio.ch.SocketDispatcher.read0(Native Method)
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
	|_ checkpoint ⇢ org.springframework.web.cors.reactive.CorsWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
	|_ checkpoint ⇢ HTTP POST "接口路径" [ExceptionHandlingWebHandler]
Stack trace:
		at sun.nio.ch.SocketDispatcher.read0(Native Method)
		at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
		at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
		at sun.nio.ch.IOUtil.read(IOUtil.java:192)
		at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
		at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
		at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1134)
		at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
		at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
		at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
		at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
		at java.lang.Thread.run(Thread.java:748)

根据在网上搜索到的结果，向配置文件中增加了如下配置，开发环境中暂未发现该问题复现，但是具体原因任不清楚。

//是否开启ssl协议
server.ssl.enabled=false
//最大空闲连接时间
spring.cloud.gateway.httpclient.pool.max-idle-time=10000

根据参考文章所述：
1.GateWay的max-idle-time：60000ms之后才释放连接，Server的connection-timeout在100ms(参考文章设置为100ms，默认值60000ms)之后就断开连接，此时GateWay会从连接池取已经断开的连接请求，以致报错。
2.因为Server是Provider, GateWay是Consumer，尽可能保证Consumer先于Provider断开连接，设置max-idle-time的时间小于connection-timeout。

网上查询了一下GateWay的max-idle-time相关内容，得到以下信息：
“设置连接的最大空闲时长为5秒(默认NULL:响应完成即可关闭),超时则关闭连接释放资源。 这个时长的设置要小于后端服务的连接超时时长,确保网关回收请求在后端服务回收请求之前完成。”

参考链接：
https://www.cnblogs.com/wftop1/p/15789238.html
https://www.javazhiyin.com/81492.html