Tuesday November 6 - Saturday August 24, 2019


Some people are unable to upload files to Slack.

Technical Summary:

On November 6th 2018 at 10:38 am PT, we began to receive reports that file uploads were failing in Slack for all customers.

A recent change in our code had an adverse affect on file uploads, causing uploads to fail for 2 hours and 14 minutes. Once our engineering team discovered the issue, they reverted the code, and full functionality was restored for all customers by 12:55 pm PT. We called an All Clear at 1:21 pm PT.

If you are still experiencing trouble please reach out to us at feedback@slack.com.

2:22 PM PST

All issues should now be resolved, and all users should now be able to upload files successfully. Sorry for the disruption, and if you're still running into troubles, drop us a line at feedback@slack.com.

1:25 PM PST

We've identified the root cause of the issues affecting file uploads, and are close to a fix. Thanks for your ongoing patience while we iron things out.

12:53 PM PST

We’re still working to fix the ongoing file upload issues. We hope to have things fully resolved as soon as possible.

12:20 PM PST

We’ve identified that some folks are unable to upload files to Slack. We’re actively investigating, and we hope to have an update soon.

10:38 AM PST

Services affected