By Laura Nolan, with contributions from Glen D. Sanford, Jamie Scheinblum, and Chris Sullivan. Assessing conditions Slack experienced a major incident on February 22 this year, during which time many users were unable to connect to Slack, including the author — which certainly made my role as Incident Commander more challenging! This incident was a textbook example of complex systems failure: it h
![Slack’s Incident on 2-22-22 - Slack Engineering](https://cdn-ak-scissors.b.st-hatena.com/image/square/ead496d9ced0e8364517998b0ef4929b2ce1c06e/height=288;version=1;width=512/https%3A%2F%2Fslack.engineering%2Fwp-content%2Fuploads%2Fsites%2F7%2F2022%2F04%2Fblack-swan-gd3523927a_1920.jpg)