Tuesday August 7, 2018

Technical Summary:
On August 7th at 12:29 PST, problems were identified with some of Slack’s job queues. These problems caused delays for a small portion of Slack users when handling unfurls, notifications, and some integrations.

As the team fixed the job queue problem, regional network instability caused reconnections to other regions starting at 13:11 PST. This impacted Slack connectivity for a small percentage of users. Internet traffic was re-routed and users were able to reconnect.

By 13:20 PST, the team was able to restore all of the Slack job queues and all regional traffic had been successfully re-routed. An all clear was called at 13:36 PST.

Our team is working with the upstream service that caused these issues so they do not occur in the future.

2:20 PM PST

We have good news to share! Everything should be back to normal with notifications, link previews, and notifications for everyone. Please let us know if you run into any further trouble at feedback@slack.com.

1:36 PM PST

We are currently investigating an issue that's impacting some folks. You may notice that link previews (unfurls) and notifications aren't coming through as they should be. There may also be issues connecting. We will have updates as soon as possible. Thanks for your patience.

12:29 PM PST

Technical summary:
On August 7th between 01:58AM and 03:51AM (PT), we received some reports of users being unable to connect to Slack. We’ve determined that the reports were isolated cases of local network issues. This has now been resolved.

9:02 AM PST

We haven't received any new reports of connectivity issues, though we’re keeping a close eye on the situation. Please contact us at feedback@slack.com if you’re unable to connect to Slack.

3:51 AM PST

Our team is still trying to pin down the root cause of these connectivity issues in Europe. Thanks again for bearing with us, your patience is very much appreciated.

3:22 AM PST

We're still exploring the cause of the connectivity troubles affecting some folks in Europe. We really appreciate your patience while we look into this further, and we're so sorry for the disruption. We hope to have more news to share soon.

2:52 AM PST

We're investigating reports of connectivity troubles for some European customers.

1:58 AM PST