Prefect: Flow Runs Crashing on Modal Push Work Pools

MinorStatus: resolvedStarted 2026-10-16 20:08 UTCResolved 2026-10-16 20:31 UTC (23 min)2 updatesstatus.prefect.io

Affected components: Orchestration

Timeline of updates

identified2026-10-16 20:08 UTC
Since 18:00 UTC on October 16, most flow runs on Modal push work pools crash during infrastructure startup. Affected runs move from Pending to Crashed with the message "sandbox exited with non-zero code 137." We have tracked the issue to an upgrade in the Modal client library and working to roll back.
resolved2026-10-16 20:31 UTC
This incident has been resolved and Modal push pools are fully operational.

Impact, status and times are the vendor’s own, as last archived. View on status.prefect.io (opens in new tab).