Microsoft 365 Alert – Service Degradation –  Microsoft 365 suite – Some Fabric users may experience intermittent failures while performing Spark job operations – Resolved

02/05/2025 08:45:00 AM

NHSmail Reference: INC46520814

Microsoft Reference: MO1066619

Issue Status: RESOLVED

Issue Description: Fabric users may have experienced intermittent failures while performing Spark job operations.

More info: Fabric premium users in UK South region may have experienced intermittent failures while performing Spark job operations for Lakehouse and Notebook.

Final Update: 05/05/2025 08:30:00 AM –  Microsoft’s investigation identified that a portion of infrastructure that facilitates Spark job operations had unexpectedly stopped responding to requests, resulting in impact. They automated recovery system restarted the affected services and repaired this problem. They have monitored the environment to validate this issue is remediated.

Scope of impact: Your organization was affected by this event, and some Fabric users attempting to perform Spark job operations may have been impacted.

Root cause: A portion of infrastructure that facilitates Spark job operations had unexpectedly stopped responding to requests, resulting in impact.

Next Steps: Microsoft are continuing their analysis of service telemetry and infrastructure logs to better understand the underlying cause of impact and develop procedures to prevent similar impact in the future.