Prefect Horizon incident

Server build jobs are delayed

Resolved after 1 hour 3 minutes, affecting Horizon: Builds (Builds), on March 26, 2026.

resolved Mar 26, 2026, 11:45 PM UTC

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

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

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