Thursday August 17, 2023

Issue summary:
On August 17, 2023 from 9:20 AM PDT to 9:37 AM PDT, some users encountered issues with messages not sending and channels and threads failing to load.

We determined that a recent indexing change caused a higher than expected level of requests to our database. The resulting high load errors were responsible for the impacted users' inability to load messages and channels.

We immediately reverted this change, which resolved the issue for affected users. We then deployed a fix to prevent this from reoccurring in the future.

6:00 PM PST

We've restored full functionality of Slack for all impacted users. Sorry for the trouble, we appreciate your patience today.

9:58 AM PST

Some customers are encountering issues loading messages and channels in Slack. We're actively looking into this, and we'll report back as more information becomes available.

9:37 AM PST