3rd Party: Some Datadog Connections Are Failing With 400 InvalidArgument Errors for llm_observability_span endpoint

This incident has been resolved. We have observed that instance rates are returning to normal levels and affected connectors are syncing successfully.

Incident Summary
Description:
We identified an issue for the Datadog connector, which resulted in syncs failing with a 400 InvalidArgument error for the llm_observability_span endpoint.

Timeline:
This issue began on Sep 25, 2026, at 9:30:00 PM UTC and was resolved on Sep 27, 2026, at 3:13:00 AM UTC.

Cause:
Connections are currently failing for `llm_observability_spanentity` with a 400 error:`InvalidArgument: Cannot parse query: '@event_type:span AND ()'`
This appears to be related to a recent change on the source side, and our engineering team is investigating

Resolution:
Fivetran implemented a fix to skip the affected endpoint and allow syncs to proceed. We have also reached out to the source team to investigate the underlying issue and are currently waiting for their response.

We have deployed a fix for this issue by skipping the affected endpoint.

We will continue to monitor all affected connectors until they resume their normal sync functionality.

We've also reached out to the Datadog team to validate the issue and resolution approach.

Next Expected Update: 3 hours

Connections are currently failing for `llm_observability_spanentity` with a 400 error:

`InvalidArgument: Cannot parse query: '@event_type:span AND ()'`

This appears to be related to recent change on the source side, and our engineering team is investigating

Next Expected Update: 2 hours

The issue has been identified and we are working to resolve it.