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Outage in Tinybird

Degraded performance in the AWS us-east public cluster.

Resolved Minor
June 22, 2026 - Started 26 days ago - Lasted 2 days

Incident Report

Summary AI Generated

Tinybird's AWS US East public cluster experienced ~47 hours of degraded performance caused by instability in Zookeeper, the coordination layer between ClickHouse replicas, which severely impacted write operations across all clusters in the region. Real-time ingestion was restored relatively quickly, but a large backlog of delayed inserts accumulated and recovery was further slowed by rate limiting from an upstream storage provider. No data was lost, as all affected inserts were safely retried and drained through the queue until full recovery.

There’s a performance degradation in the public cluster on AWS us-east.

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Latest Updates ( sorted recent to last )
MONITORING 24 days ago - at 06/24/2026 07:54AM

We are still getting rate-limited by our upstream storage provider but we are draining retries faster than before because of some optimizations we have made on the system. We are working on accelerating them as much as possible but we still have some retries in the queue.

No data has been lost, all affected inserts are being safely retried.

MONITORING 25 days ago - at 06/23/2026 02:03PM

The bulk of the earlier retries has now been recovered, and no new ingestion errors are being introduced on the customer side. Recovery is progressing more slowly than we'd like because we are currently being rate-limited by our upstream storage provider, which is limiting how quickly we can drain the remaining retries.

No data has been lost, all affected inserts are being safely retried. We'll provide the next update as soon as we see meaningful progress on either front.

MONITORING 25 days ago - at 06/23/2026 10:26AM

We're continuing to work through a backlog of delayed ingestion on our AWS US East 1 shared cluster following yesterday's degradation. Our coordination layer was resized last night and the bulk of the impact has cleared. Recovery is taking longer than expected, so affected workspaces may continue to see ingestion lag while we work through the remaining queue.

MONITORING 26 days ago - at 06/22/2026 10:05PM

We keep ingesting the delayed real time data

MONITORING 26 days ago - at 06/22/2026 09:56PM

We've identify the root cause and we are recovering the retries from the HFI ingestion at the moment. The platform should be stable now

IDENTIFIED 26 days ago - at 06/22/2026 09:30PM

We've already identified the root cause and we're working through the fix. Real-time ingestion is now fully available, we're working on ingesting past data that hasn't been processed yet.

IDENTIFIED 26 days ago - at 06/22/2026 06:52PM

We're still working on stabilising the region. We're struggling with Zookeeper, in charge of coordination between ClickHouse replicas, which is why write are a lot more affected than reads.



We've just tweaked a couple parameters that hope will aid the situation.

INVESTIGATING 26 days ago - at 06/22/2026 05:49PM

We keep working on identifying the root cause. There's impact in both reads and writes, and in all clusters in the region as the incident is affecting a shared component.



We are storing the data that gets to the Events API to retry the inserts later.

INVESTIGATING 26 days ago - at 06/22/2026 04:51PM

There’s a performance degradation in the public cluster on AWS us-east.

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