nginx 100% cpu and it may be a nginx bug

[wangbin579]

[root at 208 sbin]# /home/nginx/sbin/nginx -V
nginx: nginx version: nginx/1.0.10
nginx: built by gcc 4.1.2 20080704 (Red Hat 4.1.2-48)
nginx: TLS SNI support enabled
nginx: configure arguments: --prefix=/home/nginx --user=nginx
--group=nginx --without-select_module --without-poll_module
--with-http_ssl_module --with-http_realip_module
--with-http_gzip_static_module --with-http_stub_status_module
--without-http_fastcgi_module --without-http_memcached_module
--without-http_empty_gif_module --with-pcre=../pcre-7.9
--with-openssl=../openssl-0.9.8r --add-module=../hmux
--add-module=../ngx_http_upstream_keepalive-c6396fef9295 --with-debug

part of nginx conf file： 

events {
    worker_connections  8192;
    use epoll;
    epoll_events 4096;
    accept_mutex off;
}

...
    upstream yyy  {
        server xxx.xxx.xxx.xxx:36901;
        server xxx.xxx.xxx.xxx:36902;
        server xxx.xxx.xxx.xxx:36903;
        server xxx.xxx.xxx.xxx:36904;

        keepalive 1024;
    }

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,218736,218739#msg-218739