Tuesday August 28, 2018


Some customers may experience trouble making Slack Calls from mobile

Technical Summary
On August 28th, 2018 between 6:28pmPDT and 9:24pmPDT, Slack users in the APAC region were unable to initiate a Slack call on a mobile device.

At 6:28pmPDT, we retained an out-of-date DNS record during a routine infrastructure change. This prevented Slack Calls from mobile devices in APAC from connecting with the up-to-date infastructure settings.

At 9:24pmPDT we manually removed the errant record and immediately resolved the issue. We’re currently working on preventative measures to avoid repeats of this scenario.

10:23 PM PST

We're back to smooth sailing! We've resolved the Calls trouble and you should now be able to make Slack Calls from Android and iOS as normal. Thank you for bearing with us.

9:36 PM PST

We are investigating issues with making Slack Calls from the Android and iOS apps. Apologies for the trouble — we're on the case!

6:28 PM PST

Services affected





Connectivity issues affecting all workspaces

Technical Summary:
On August 28, 2018 between 10:15amPDT and 10:59amPDT, Slack experienced a 44-minute outage where all users were unable to establish new connections to the Slack service. Users who were already connected to the service were able to remain connected during this time.

A configuration change at 10:15amPDT accessed incorrect settings and prevented service access for new connections. We reverted the configuration change at 10:59amPDT and new connections to the service were able to resume. We called the all clear at 11:23amPDT.

We are currently hard at work to scope preventative measures to ensure this does not happen in the future.

2:34 PM PST

Connections have improved for all users, and folks should be able to connect again. If you're still experiencing issues, drop us a line at feedback@slack.com.

11:23 AM PST

We've isolated the issue, and things look to be improving. Thanks for hanging in there.

11:09 AM PST

Investigation is ongoing, and we don't have updates to share at the moment. We apologize for the disruption to your day.

11:00 AM PST

Folks are having troubles connecting to their workspaces. We're looking into the cause and will have updates shortly.

10:15 AM PST

Services affected