On November 3rd from 2:57am PT until 3:44am PT, Slack experienced an outage with one of our internal services responsible for the performance of multiple features. In particular, during this time, customers may have experienced delays with product features such as push notifications, imports, search, threads, and unfurls in Slack.
After stopping and restarting the impacted services, full functionality was restored and the issue was resolved at 3:59am PT.
9:39 AM PST
Thanks for your patience. Notifications, unfurling links, loading threads, and our Events API should be back to normal now. If you're still seeing issues, drop us a line at firstname.lastname@example.org.
4:01 AM PST
Users might be running into problems with processing threads and unfurls. Notifications might be delayed as well. We're sorry about the problem and working to fix it.
3:27 AM PST