Incident postmortem for July 19: what happened and what’s next
On July 19, CircleCI faced a sitewide outage which left thousands of teams unable to test and deploy builds for the better part of a day. This outage affected the productivity of many development teams, and surely caused a few missed deadlines. We value the trust our customers place in us, and are deeply sorry for the effect this had on their work. For those interested, we want to give more details as to what happened, why it happened, and what we’re doing about it.