Pain point · Integrations · Blocks work
S3 warehouse destinations fail with IAM-role authentication on Cloud US
1 source thread · first seen 2026-10
Summary
Warehouse syncs to S3 destinations using IAM-role connections fail immediately on PostHog Cloud US because a required server-side setting is missing. The customer cannot configure that setting.
- Affects
- PostHog Cloud US customers using S3 warehouse destinations
- Workaround
- Removing the S3 destination override restores the table sync.
Evidence
Excerpts are copied word for word from the source; follow the link to read it in full.
“Role-based AWS access is not available: BATCH_EXPORT_S3_EXTERNAL_ROLE_ARN is not set”