Outage in Langfuse
Delayed Ingestion for non v4 SDKs
Resolved Minor
September 14, 2026 - Started 3 days ago
- Lasted about 3 hours
Incident Report
Summary AI Generated
Langfuse experienced a ~3-hour ingestion delay affecting users on older (non-v4) SDKs, caused by performance issues in the batch job responsible for migrating data into the v4 data model. The team increased batch job throughput to recover the backlog, reducing delays to approximately 60 minutes before full resolution. Users on v4-compatible SDKs were unaffected throughout the incident.
We currently experience an ingestion delay of old SDKs by 3 hours. This is due to performance issues in our batch job which moves data into the v4 data model (https://langfuse.com/changelog/2026-08-17-langfuse-v4).
We currently work on improving the batch job. All v4 compatible SDKs are not impacted by this. Upgrading SDKs is recommended.
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Latest Updates ( sorted recent to last )
MONITORING
2 days ago - at 09/14/2026 05:14AM
We're making consistent progress in our backlog and are currently seeing delays of about 60 minutes.
INVESTIGATING
3 days ago - at 09/14/2026 03:52AM
We considerably increased throughput of the batch job to write data into v4 data model. We are currently catching up processing data.
INVESTIGATING
3 days ago - at 09/14/2026 02:51AM
We currently experience an ingestion delay of old SDKs by 3 hours. This is due to performance issues in our batch job which moves data into the v4 data model (https://langfuse.com/changelog/2026-08-17-langfuse-v4).
We currently work on improving the batch job. All v4 compatible SDKs are not impacted by this. Upgrading SDKs is recommended.
Latest Langfuse outages
OTEL Ingestion Delay exceeds 10 minutes - 8 days ago
Degraded OTEL ingestion in US region - 14 days ago
Performance degradation on ingestion path - 22 days ago
Latency degradation on legacy ingestion queue - 22 days ago
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