--- nginx-1.1.15/src/event/modules/ngx_epoll_module.c 2011-09-30 22:12:53.000000000 +0800 +++ nginx-1.1.15-patched/src/event/modules/ngx_epoll_module.c 2011-11-30 11:08:46.775817019 +0800 @@ -682,6 +682,17 @@ wev = c->write; if ((revents & EPOLLOUT) && wev->active) { + if (c->fd == -1 || wev->instance != instance) { + + /* + * the stale event from a file descriptor + * that was just closed in this iteration + */ + + ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "epoll: stale event %p", c); + continue; + } if (flags & NGX_POST_THREAD_EVENTS) { wev->posted_ready = 1;