Outage in Slack
Issue with Sending and Receiving Messages
Resolved MinorIncident Report
Summary AI Generated
Slack experienced a 2.7-hour incident where some users encountered elevated error rates and degradations when sending and receiving messages across the platform. The issue was caused by two database shards becoming overloaded, which led to query failures and messaging problems. The incident was resolved by deploying a fix to the affected shards and unpausing ProcessMessage jobs that had been temporarily halted.
We're investigating a new incident.
- Current impact to end users: Some users may experience elevated error rates and message-related degradations when sending and receiving messages across the Slack platform
- Teams are actively engaged to identify the root cause and remediate the service impact and will provide updates as information is available.
We apologize for the inconvenience and will continue sharing updates as they become available.
Components affected
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Latest Updates ( sorted recent to last )
about 7 hours ago - at 03/30/2026 12:29AM
A fix has been deployed to the affected shards. ProcessMessage jobs had been paused, and these have now been unpaused on the affected shards. We are monitoring performance to assess whether the shards have returned to expected performance levels.
about 8 hours ago - at 03/29/2026 11:30PM
We’re continuing to investigate the issue. We have identified two affected shards that are becoming overloaded, causing elevated query failures and message-related degradations. We are in the process of testing a potential fix. We’ll provide the next update once new information becomes available.
about 9 hours ago - at 03/29/2026 10:38PM
We're investigating a new incident.Current impact to end users: Some users may experience elevated error rates and message-related degradations when sending and receiving messages across the Slack platformTeams are actively engaged to identify the root cause and remediate the service impact and will provide updates as information is available. We apologize for the inconvenience and will continue sharing updates as they become available.
Latest Slack outages
Trouble connecting to Slack - 4 days ago
Intermittent SSO login errors accessing Slack workspace. - 21 days ago
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