Heroku
Status Page
Last 30 Days
Incidents in the last 30 days
Investigating an issue with elevated H99 Errors minor
Beginning at 23:17 UTC on September 24, 2025 and continuing until 00:39 UTC on September 25, 2025, impacted customers experienced elevated H99 errors on network runtime in US & EU. This issue is now resolved.
Investigating an Issue with Heroku AI responses for gpt-oss-120b model minor
Heroku engineers are investigating a decline in successful API responses from the gpt-oss-120b AI model in US region.
Issue with DNS for New Apps and Domains minor
The upstream DNS issue impacting Heroku has been resolved. Customers should no longer see errors, though some may continue to experience degraded performance as services stabilize. We are actively monitoring the situation to ensure full reliability and will provide further updates as needed.
Investigating an issue with Heroku Connect new Connection updates minor
Configuring new connections within the Heroku Connect add-on through the dashboard is functioning but requires a workaround. Currently, users must cancel at step 2 of the connection configuration and refresh to see the connection status be successful. Our engineers are working to resolve the issue.
Investigating increased dyno relocations in Cedar Common Runtime minor
Engineers are deploying a kernel update to Common Runtime fleets to fix an issue causing frequent dyno relocations.