On May 16th around 8am PST we received reports of elevated error rates on our SSL hosting stack that resulted in certain sites not responding to requests in our expected performance window. During this time, sites using SSL may have experienced longer loading times, or timeouts. The elevated errors were caused by a domain that was improperly misconfigured. Our engineers identified the domain, and quickly applied a patch that resolved the elevated error rates. Unfortunately, this still resulted in around 38 minutes of degraded performance for some sites.
We're currently testing an improved new SSL infrastructure which will address the impact and severity of these type of issues, and will be rolling out the upgraded infrastructure in the coming weeks.