At 4:38pm PT on September 6th, 2018, a change was deployed to Slack which prevented the majority of logged in users from viewing messages and stopped approximately 6.74% of users from logging in to Slack altogether.
The change that was added increased the load on one of our databases, which eventually failed. At 4:53pm PT we reverted the changes and within five minutes users were able to begin using Slack again. We were officially “all clear” by 5:01pm PT.
4:34 PM PST
Things should be back to normal now. Thanks for your patience, and we're extremely sorry for the disruption to your day. Our team is continuing to investigate this issue to ensure it doesn't happen again.
5:01 PM PST
We're investigating problems with connectivity at this time. We're sorry for the interruption and will keep you posted as soon as we have an update.
4:38 PM PST