Changes / Lightdash / Network configuration may cause warehouse timeout errors
Lightdash: Major incident: Network configuration may cause warehouse timeout errors
Summary
Lightdash reported a major EU Cloud incident from 2026-04-21 11:37 UTC to 2026-04-21 14:48 UTC (3 h 11 min). An unintentionally provisioned egress IP, 34.140.90.83, caused some warehouse queries to be blocked by customer firewalls. Lightdash worked with affected customers to update allowlists; error rates returned to normal and the incident was resolved.
Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.
What changed
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After: Network configuration may cause warehouse timeout errors
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After: major
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After: resolved
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After: 2026-04-21 11:37 UTC
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After: 2026-04-21 14:48 UTC
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After: Lightdash Cloud (EU), Lightdash Cloud - Lightdash Cloud (EU)
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After: We unintentionally added a new external IP address for customers in the EU. Customers using firewalls for their warehouse may see unexpected requests from: 34.140.90.83 - we are fixing this now.
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After: Earlier today, an additional egress IP address was unintentionally provisioned on our EU cluster. This caused some queries from Lightdash to customer warehouses to be blocked, where the new IP was not on the customer's allowlist.
We've worked directly with affected customers to apply an allowlist update, and error rates have returned to normal. We're now monitoring to confirm stability and working with our cloud provider to consolidate back to a single egress IP at the infrastructure layer.
Action required if you're still seeing warehouse connection errors: please ensure both `34.79.239.130` and `34.140.90.83` are on your warehouse IP allowlist. Our [IP allowlisting guide](https://docs.lightdash.com/get-started/setup-lightdash/connect-project#adding-lightdashs-static-ip-addresses-to-your-allow-list) has been updated to reflect the current EU egress IP set and includes step-by-step instructions.
We apologise for the disruption.
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History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Major incident: Network configuration may cause warehouse timeout errors (this change) Lightdash reported a major EU Cloud incident from 2026-04-21 11:37 UTC to 2026-04-21 14:48 UTC (3 h 11 min). An unintentionally provisioned egress IP, 34.140.90.83, caused some warehouse queries to be blocked by customer firewalls. Lightdash worked with affected customers to update allowlists; error rates returned to normal and the incident was resolved. | Major incident |
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