Slack Users
Slack Usc
Issue summary:
Starting around 6:00 a.m. PST on January 4, 2021, some customers started experiencing occasional errors and increased latency while using Slack. Around 7:00 a.m. PST there was a rapid increase in errors and Slack wasn’t usable for all customers.
Around 8:13 a.m. PST, we addressed an issue with our provisioning service and began provisioning healthy servers once again to address traffic requests. From there, at 8:45 a.m. PST, some customers began to see improvements, but others who were trying to launch their Slack clients were unable to do so. By around 9:15 a.m. PST most customers were able to use Slack again. We continued to experience elevated errors until 10:40 a.m. PST, after which all customers were able to use Slack again.
We also discovered some customers were stuck on a webpage in the Slack desktop app. This is a separate bug that’s being investigated, but was heightened during the outage. Troubleshooting steps, such as restarting, forcing quitting Slack from Activity Monitor or Task Manager, or clearing cache, allowed affected customers to access the app once again.
We know our customers rely on Slack. Our top priorities are working alongside our cloud vendors to fully understand the underlying causes of the outage and putting safeguards in place to prevent similar problems from happening again. If you’d like to receive a full Root Cause Analysis (RCA) report, please reach out to feedback@slack.com to request one.
5:04 PM PST
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