netstat两端个数不相同

zhangdberic

两台机器安装的都是nginx，一台反向代理到另一台。但在偶尔处理请求，反向代理的时候，nginx的error.log提示错误信息:2018/05/17 10:18:42 [error] 3647#0: *94 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 10.60.9.156, server: localhost, request: "POST /services?appkey=test&service=dfss.upload&version=1.0×tamp=1526523509&serialnum=f5b7c02f560b423e8187e744152535ed&sign=CF1C96595F4BCC6DA5C57FD09C0AEA9C3DA46195&format=json&purview=0 HTTP/1.1", upstream: "http://10.60.32.169:80/services?appkey=test&service=dfss.upload&version=1.0×tamp=1526523509&serialnum=f5b7c02f560b423e8187e744152535ed&sign=CF1C96595F4BCC6DA5C57FD09C0AEA9C3DA46195&format=json&purview=0", host: "10.60.32.173"
2018/05/17 10:18:43 [error] 3647#0: *94 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 10.60.9.156, server: localhost, request: "POST /services?appkey=test&service=dfss.get&version=1.0×tamp=1526523510&serialnum=a8f85c235585410fa46773bc3cfe4f26&sign=460AC0C729B6DF4B1985AF0141C8F373706B1B38&format=json&id=%2Fdfss%2Ffss1%2Fdata%2F2018%2F05%2F17%2F0UfstBmowlvzel5sp5Jce3632233996.dat HTTP/1.1", upstream: "http://10.60.32.169:80/data/2018/05/17/0UfstBmowlvzel5sp5Jce3632233996.dat?appkey=test&service=dfss.get&version=1.0×tamp=1526523510&serialnum=a8f85c235585410fa46773bc3cfe4f26&sign=460AC0C729B6DF4B1985AF0141C8F373706B1B38&format=json&id=%2Fdfss%2Ffss1%2Fdata%2F2018%2F05%2F17%2F0UfstBmowlvzel5sp5Jce3632233996.dat", host: "10.60.32.173"



然后使用netstat查看两端的状态，发现了一个可疑的事情：netstat两端的连接不对等，而且配置反向代理的服务器，多出了两个连接。


配置了反向代理的服务器



upstream服务器


没办法关闭两台服务器，重新启动nginx，配置了反向代理服务器状态如下：


哪位遇到过这样的问题呀？帮忙给解释一下。谢谢。