I’ve heard good things about Zenni Opti­cal, but what a bad time for the Google­bot to attempt to crawl the site. If your busi­ness depends on web­site uptime, you need to have a com­plete dupli­cate of the site on a sep­a­rate server and a sep­a­rate devel­op­ment envi­ron­ment (some­times these can be the same, so two copies instead of three). The whole point is to min­i­mize down­time dur­ing main­te­nance win­dows. Bad luck for Zenni. (Click to enlarge, etc.)