Wednesday January 29, 2020

Incident

Some customers are having trouble previewing files

Issue Summary:

On January 29, 2020 from 5:00 p.m. to 8:53 p.m. PST, some files and file thumbnails were unavailable. This specifically impacted PDF, .docx, and .xlsx files. We deployed a change that inadvertently affected the way these files and thumbnails are delivered to Slack. We rolled the change back and the issue was resolved at 8:53 p.m. PST.

5:47 PM PST

For those affected, we're happy to report that the issues with PDF, .docx and .xlsx file previews have been fixed. We apologize for the trouble this caused.

9:02 PM PST

We’re still investigating the issue with file previews, and we've identified that this is affecting some .docx and .xlsx files as well. We'll confirm as soon as previews are working as they should be. Thanks for bearing with us.

7:41 PM PST

Some of our customers are currently having trouble previewing PDF files uploaded in Slack. We're currently investigating the cause, and we'll keep you posted as soon as we have more information. We're sorry for the disruption.

7:10 PM PST

Services affected

Posts/Files

Status

Incident

Incident

Issues with sending messages and accessing the Help Center

Issue Summary:

On January 29, 2020 from 3:19 a.m. PST, customers experienced several issues when using Slack. In particular, customers may have seen errors when sending messages in Slack or when visiting our Help Center. A spike in traffic caused an overload on one of our databases. We provisioned more backend servers and the traffic spike passed. The issue was resolved at 3:22 a.m. PST.

3:19 AM PST

Services affected

Messaging

Status

Incident