recv() failed (104: Connection reset by peer) while reading response header from upstream

场景:为了得到用户在线等实时信息，在客户端做了个ajax轮训,每隔5秒请求一次；
用户量一上来，于是问题就来了,页面各种卡nginx日志文件
[root@iZt web]# tail -f /data/log/nginx_error.log
2017/06/16 19:20:28 [error] 230555#0: *10228041 recv() failed (104: Connection reset by peer)
while reading response header from upstream,client: 42.19.1.114, server: 47.18.212.1, request:
"POST /api-chat/subshade?rnd=880 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000",host: "www.1j008.com", referrer: "http://www.2008.com/6166"
.......狂刷此错误
php日志文件
[root@iZt web]# tail -f /data/log/php-fpm.log
[19-Jun-2017 10:51:05] WARNING: [pool www] child 754153 exited on signal 11 (SIGSEGV) after 74.433547 seconds from start
[19-Jun-2017 10:51:05] NOTICE: [pool www] child 755405 started
.......狂刷此错误  百度谷歌后分析结果,大意如下几点:
1.  php程序执行时间超过php-fpm.conf 中 request_terminate_timeout = 300；设置的值，然后php-fpm进程立即退出，此时nginx得不到php-fpm进程的正确结果，响应502
解决方法： 改request_terminate_timeout 0;不限制超时   2. php-fpm进程数量来不及处理。
解决方法： 增大php-fpm进程数 3. 因为每个php-fpm在处理一定数量请求后自动stop,然后create new php-fpm
解决方法： 改pm.max_requests限制.....
对应一下我的日志看来，网上的症状确实与我的同出一辙。
窃喜.....没多久发现不对，对应着改了一轮下来，各种服务重启， 问题依旧、 好；既然无果那么就分析一下php-fpm疯狂的终止原因[root@iZt web]#dmesg
......
php-fpm[744779]: segfault at 1c ip 00000000007a8ea1 sp 00007ffe40af5330 error 4 in php-fpm[400000+9a9000]
php-fpm[744924]: segfault at 10bc890 ip 000000000078931f sp 00007ffe40af56e8 error 4 in php-fpm[400000+9a9000]
php-fpm[746677]: segfault at 1c ip 00000000007a8ea1 sp 00007ffe40af5330 error 4 in php-fpm[400000+9a9000]
php-fpm[746738]: segfault at 0 ip 00000000007a8ead sp 00007ffe40af5330 error 6 in php-fpm[400000+9a9000]
php-fpm[746371] general protection ip:7a8ead sp:7ffe40af5330 error:0 in php-fpm[400000+9a9000]好了，问题找到
在php里面我确实处理过客户端ip  类似$_SERVER['REMOVE_ADDR']方法得到的ip
经过ip2long ( string $ip_address )转换时出错， 因为 $ip_address = "这里的ip不合符规则里面有逗号"过滤之....
安静了

转载于:https://www.cnblogs.com/sixiong/p/7048135.html

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