Prefect Horizon incident

Server build jobs are delayed

Minor Resolved View vendor source →

Prefect Horizon experienced a minor incident on March 26, 2026 affecting Horizon: Builds (Builds), lasting 1h 3m. The incident has been resolved; the full update timeline is below.

Started
Mar 26, 2026, 10:42 PM UTC
Resolved
Mar 26, 2026, 11:45 PM UTC
Duration
1h 3m
Detected by Pingoru
Mar 26, 2026, 10:42 PM UTC

Affected components

Horizon: Builds (Builds)

Update timeline

  1. investigating Mar 26, 2026, 10:42 PM UTC

    MCP server builds are delayed due to a degradation in our background job system. The team is investigating Request serving is not impacted

  2. investigating Mar 26, 2026, 11:18 PM UTC

    A fix has been rolled out for the background system, and build jobs are catching up

  3. resolved Mar 26, 2026, 11:45 PM UTC

    Background job system is fully operational and builds are being started normally