Outage in Langfuse
Degraded LLMaJ execution in EU
Resolved Minor
August 18, 2026 - Started 9 days ago
- Lasted about 1 hour
Incident Report
Summary AI Generated
LLM-as-a-Judge (LLMaJ) evaluation execution in Langfuse's EU region was degraded for approximately 1.3 hours due to a slow tenant/model workload overwhelming evaluation throughput, compounded by lock-expiry retries multiplying the work queue and a concurrent worker rollout prolonging recovery. Autoscaling eventually responded and began draining the backlog. The incident was classified as minor and resolved as the system self-corrected.
Eval execution in EU region is taking longer than usual
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Latest Updates ( sorted recent to last )
MONITORING
9 days ago - at 08/18/2026 12:47PM
our autoscaling responded slower than expected, but responded nonetheless. the backlog is draining
IDENTIFIED
9 days ago - at 08/18/2026 12:27PM
evaluation throughput was overwhelmed by a slow tenant/model workload, with lock-expiry retries multiplying work; the concurrent worker rollout prolonged the incident.
INVESTIGATING
9 days ago - at 08/18/2026 12:06PM
Eval execution in EU region is taking longer than usual
Latest Langfuse outages
Performance degradation on ingestion path - 2 days ago
Latency degradation on legacy ingestion queue - 2 days ago
Evaluations are delayed in EU - 7 days ago
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