WordPress 崩溃、nginx 和 fastcgi 问题？

Question

我的 wordpress 网站目前有这个问题，它可以在服务器重启后运行大约一天，但随后出现了这组错误：

2015/12/15 22:06:42 [crit] 12650#0: *28 connect() to unix:/var/run/php5-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 46.166.139.20, server: example.com, request: "POST /xmlrpc.php HTTP/1.0", $
2015/12/15 22:08:19 [error] 3216#0: *18 FastCGI sent in stderr: "PHP message: PHP Warning:  trim() expects parameter 1 to be string, array given in /var/www/html/wp-includes/option.php on line 30
PHP message: PHP Warning:  trim() expects parameter 1 to be string, array given in /var/www/html/wp-includes/option.php on line 30" while reading response header from upstream, client: 104.33.64.70, server: example.com, request: "P$
2015/12/15 22:40:08 [error] 3216#0: *197 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 180.76.15.142, server: example.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/$
2015/12/15 22:40:20 [error] 3216#0: *199 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 180.76.15.19, server: example.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/v$
2015/12/15 23:08:27 [error] 3216#0: *201 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 180.76.15.143, server: example.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/$
2015/12/15 23:08:39 [error] 3216#0: *203 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 180.76.15.12, server: example.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/v$
2015/12/15 23:20:20 [error] 3216#0: *205 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 104.33.64.70, server: example.com, request: "GET /wp-admin/upgrade.php?step=1&backto=%2Fwp$
2015/12/15 23:22:20 [error] 3216#0: *205 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 104.33.64.70, server: example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "fastcg$
2015/12/15 23:57:09 [error] 3216#0: *367 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 46.166.139.20, server: example.com, request: "POST /xmlrpc.php HT$
2015/12/15 23:57:39 [error] 3216#0: *369 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 46.166.139.20, server: example.com, request: "POST /xmlrpc.php HT$
2015/12/15 23:57:41 [error] 3216#0: *371 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 46.166.139.20, server: example.com, request: "POST /xmlrpc.php HT$
2015/12/15 23:57:56 [error] 3216#0: *373 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 46.166.139.20, server: example.com, request: "POST /xmlrpc.php HT$

之后，错误日志只是一遍又一遍地重复（11：资源暂时不可用）代码。此时尝试访问网站本身只会给出一个 nginx“发生错误”页面，告诉我检查错误日志。

我不知道究竟是什么导致了最初的卡顿，而且看起来在一段时间后服务器完全锁定了。有什么建议吗？谢谢！

Answer 1

46.166.139.20 的某个人试图猜测您的密码。如果你不使用 WP 的 XML-RPC，你应该禁用它。