Thursday October 18, 2018

Incident

Users experiencing slowness in the app

Technical Summary
On October 18, 2018 at 4 PM PT, we identified a bug in how we were handling accounts being added to IDP groups. This resulted in the deactivation of some user accounts from their workspaces. This also removed their associated integrations, and archived many private channels.

We quickly reverted a code change, and began restoring the affected user accounts, private channels and integrations back to their previous states.

At 5:06 PM PT, we noticed that some servers were overloaded as a result of the restoration efforts we made. This meant that some customers were unable to connect to Slack. We monitored the situation as the server recovered. At 7:41 PM PT, our engineers confirmed functionality was restored for all customers.

On October 19 at 4:32 PM PT, we fully resolved the provisioning issue. Customers who were affected by this issue needed to reload Slack to regain access to their workspaces. We’re continuing to investigate the root cause of these issues to ensure this doesn’t happen in the future.

5:33 PM PDT - Oct 19th・See in your timezone

We've been given the all-clear. Everyone should be able to use Slack at full speed once more. If you are still experiencing slow performance of the app please try an app reload (ctrl or cmd + R) and let us know if this doesn't help. We are truly sorry if your day was affected by this issue. We will do all we can to make sure this doesn't happen again.

11:40 PM PDT - Oct 18th・See in your timezone

No new news to share just yet, but we're continuing our efforts. We truly appreciate your patience.

10:55 PM PDT - Oct 18th・See in your timezone

No further developments to share but we wanted to let you know we're doing all we can to get this app slowness fixed as soon as possible. Thanks again.

10:17 PM PDT - Oct 18th・See in your timezone

Thank you for sticking with us through this. We hope to have the app running at regular speeds soon.

9:29 PM PDT - Oct 18th・See in your timezone

Nothing further to add, sadly. The team continues to monitor things and work on a solution for this app slowness.

8:44 PM PDT - Oct 18th・See in your timezone

To those affected by this app slowness we're truly sorry for the disruption. We're working hard to get this rectified.

8:12 PM PDT - Oct 18th・See in your timezone

Thank you again for your patience. We're doing all we can to get things working at normal speeds once more. We're working hard to get this rectified.

7:30 PM PDT - Oct 18th・See in your timezone

We're still investigating the cause of this general slowness with the app and hope to have some good news soon.

6:58 PM PDT - Oct 18th・See in your timezone

Thank you for your patience here. Fixing this slowness in the app is the highest priority for the team right now.

6:28 PM PDT - Oct 18th・See in your timezone

Nothing new to share just yet. The team are monitoring things and we'll let you know as soon as we get more information.

5:55 PM PDT - Oct 18th・See in your timezone

Some people have reported general slowness in their workspaces. Apologies for this hassle. We'll get this fixed as soon as possible.

5:24 PM PDT - Oct 18th・See in your timezone

Services affected

Connections

Messaging

Posts/Files

Search

Status

Resolved

Incident

SCIM issues affecting some workspaces

Technical Summary

On October 18, 2018 at 4 PM PT, we identified a bug in how we were handling accounts being added to IDP groups. This resulted in the deactivation of some user accounts from their workspaces. This also removed their associated integrations, and archived many private channels.

We quickly reverted a code change, and began restoring the affected user accounts, private channels and integrations back to their previous states.

At 5:06 PM PT, we noticed that some servers were overloaded as a result of the restoration efforts we made. This meant that some customers were unable to connect to Slack. We monitored the situation as the server recovered. At 7:41 PM PT, our engineers confirmed functionality was restored for all customers.

On October 19 at 4:32 PM PT, we fully resolved the provisioning issue. Customers who were affected by this issue needed to reload Slack to regain access to their workspaces. We’re continuing to investigate the root cause of these issues to ensure this doesn’t happen in the future.

5:29 PM PDT - Oct 19th・See in your timezone

After some more checks and monitoring we've been given the all-clear. Any affected accounts, integrations, and channel memberships should now be restored. If you’re continuing to see issues please let us know. We know how important your time is and we are truly sorry for taking it today.

11:57 PM PDT - Oct 18th・See in your timezone

All those affected by these SCIM problems should see things restored once more. Though please do let us know if not at feedback@slack.com. We hope to share some more positive news soon.

11:30 PM PDT - Oct 18th・See in your timezone

We are working closely with the affected workspaces to get these SCIM issues rectified. Thanks for holding tight.

10:41 PM PDT - Oct 18th・See in your timezone

The team is still monitoring the changes we've made to fix these SCIM problems. We'll let you know when we have some good news to share.

9:54 PM PDT - Oct 18th・See in your timezone

We are seeing positive signs so far from the fixes to these SCIM issues but we're not out of the woods just yet.

9:19 PM PDT - Oct 18th・See in your timezone

The team continues to work on a fix to restore users, channels, and integrations affected by this issue. We'll keep you updated.

8:40 PM PDT - Oct 18th・See in your timezone

We're working on a fix to restore users, channels, and integrations affected by this issue. Please hold tight.

8:07 PM PDT - Oct 18th・See in your timezone

We really appreciate your patience as we work to get these SCIM issues sorted.

7:34 PM PDT - Oct 18th・See in your timezone

No updates to share just yet with the SCIM issues affecting some workspaces. Though, we'll let you know as soon as we know.

7:02 PM PDT - Oct 18th・See in your timezone

We're still digging through the reports and working with customers to get these SCIM troubles sorted. Please hold tight.

6:31 PM PDT - Oct 18th・See in your timezone

Some workspaces using SCIM may see issues with their Slack accounts. We're working hard to get this rectified quickly.

5:58 PM PDT - Oct 18th・See in your timezone

Services affected

Login/SSO

Workspace/Org Administration

Status

Resolved

Incident

Trouble with Events API, notifications, unfurls, and threads

Technical Summary:

Starting on October 17, 2018 at 11:28 AM PT, some customers were seeing delays with certain features, including link unfurls, notifications, and integrations. After noticing a large increase in backlogged jobs, our engineering team began performing service restarts to process the delayed job queue. This restored functionality for all affected features at 9:25 AM PT on October 18th.

12:27 PM PDT - Oct 19th・See in your timezone

Thanks for your patience. Notifications, unfurling links, loading threads, and our Events API should be back to normal now. If you're still seeing issues, drop us a line at feedback@slack.com.

10:05 AM PDT - Oct 18th・See in your timezone

We're in the final steps to restore full service to the Events API.

9:59 AM PDT - Oct 18th・See in your timezone

Our team is close to a resolution with our Events API. Your continued patience is appreciated.

9:29 AM PDT - Oct 18th・See in your timezone

Events API is delayed and we're working to restore the service as quick as we can. Apologies for the trouble.

8:59 AM PDT - Oct 18th・See in your timezone

We're seeing improvements with most features working correctly again. Delays are still affecting the Events API and we're working to fix it - appreciate the patience.

8:30 AM PDT - Oct 18th・See in your timezone

We're still patching up the delays affecting notifications, unfurling links, and loading threads. Apologies for the problems.

7:56 AM PDT - Oct 18th・See in your timezone

Notifications, threads, and unfurling are not working correctly for some users. We're working to bring back full functionality.

7:27 AM PDT - Oct 18th・See in your timezone

We're still investigating delays and problems with some features, including unfurling, threads, and notifications.

6:56 AM PDT - Oct 18th・See in your timezone

Some users might be running into problems with processing threads and unfurls. Notifications might be delayed as well. We're sorry about the problem and working to fix it.

6:26 AM PDT - Oct 18th・See in your timezone

Services affected

Link Previews

Notifications

Apps/Integrations/APIs

Status

Resolved