Friday September 17, 2021

Outage

Service degradation between 8:43 a.m. and 9:16 a.m. PDT

Issue summary:
On September 17, 2021 from around 8:43 a.m. to 9:16 a.m. PDT, users may've encountered degraded service in Slack, such as messages failing to send.

During this time, requests were slower to complete and affected customers experienced slowness in Slack. For roughly 24 seconds during this period, all customers encountered trouble when using Slack.

Requests recovered thereafter.

Note: We've updated the incident title and added affected services to more accurately reflect our understanding of the problem.

5:43 PM PST

We've determined the source of the issue, and there should not be ongoing impact. If you continue to experience issues using Slack normally, please let us know at feedback@slack.com

10:10 AM PST

Slack experienced elevated error rates between 8:43 a.m. and 8:52 a.m. PDT. We're investigating now and will be back with more information as soon as it's available, or in 30 minutes.

9:37 AM PST

Services affected

Notifications

Connections

Calls

Messaging

Search

Link Previews

Apps/Integrations/APIs

Posts/Files

Workspace/Org Administration

Login/SSO

Status

Outage