Between the hours of 09:30 Jan 14, 2020, PDT and, 17:30 Jan 15, 2020, some Snowflake customers in AWS - US East (N. Virginia) were experiencing intermittent query failures while executing warehouses of size large and extra-large.
Finally, our cloud provider AWS took a series of steps to remediate the problem:
The root cause for this issue was an incorrect routing configuration in AWS US East (N. Virginia) datacenter that resulted in communication failures between machines in a large warehouse. The loss of network connection resulted in queries failing on a non-deterministic basis.
First, we apologize for the inconvenience caused by this incident.
Note: The information contained in this report is confidential and is intended solely to promote safety and reduce customer risk.