Outage in Langfuse
[US] Fast Mode Preview data delayed
Resolved Minor
April 01, 2026 - Started about 1 month ago
- Lasted 3 days
Incident Report
Data written via non-latest SDK versions may arrive with an delay of ~90min in the fast mode right now. We have identified the issue and are currently catching up.
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Latest Updates ( sorted recent to last )
MONITORING
about 1 month ago - at 04/03/2026 08:05PM
We added a patched and are making progress again in the experiment dual writes into the new format. While this is ongoing, we recommend to disable "Fast" mode to see your experiment runs within the trace view.
IDENTIFIED
about 1 month ago - at 04/01/2026 07:48PM
Processing delay for fast mode is down to our usual levels again. When in fast mode, a subset of experiment tracing data is currently unavailable via the UI. We continue to investigate the experiments dual write issues.
INVESTIGATING
about 1 month ago - at 04/01/2026 07:28PM
Processing delay is down to ~50min and declining. We expect full catch-up for non-experiments within the next 20 minutes.
INVESTIGATING
about 1 month ago - at 04/01/2026 07:14PM
In addition, we're observing extended delays for experiment spans being ingested with SDK versions published before November 2025. We're working on progress on those.
INVESTIGATING
about 1 month ago - at 04/01/2026 07:13PM
Data written via non-latest SDK versions may arrive with an delay of ~90min in the fast mode right now. We have identified the issue and are currently catching up.
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