From approximately 07:48 to 10:11 UTC on September 7, clients encountered errors in the UI when working with line items and creatives.
Scope of Impact
During the incident window, customers began seeing errors in the UI and were unable to save new or edited creatives and line items.
2021-09-07 07:48: incident started: concurrent, high-cost requests caused database timeouts which led to an increase in error responses to customers
2021-09-07 09:08: issue was escalated to engineers
2021-09-07 10:11: incident resolved: back-end API services restarted, resetting database connections
The incident was caused by an increase in queries which caused intermittent latency and errors. Our API's design currently prevents proper throttling of high-cost calls that tie up database connections. A decrease in available database resources began causing other API calls to fail or timeout. This ultimately resulted in a high level of intermittent errors that caused our platform to become unstable.
Our engineers resolved the issue by restarting multiple back-end API services which freed up the database connections and began allowing requests to successfully return.
The incident has been fully resolved. We apologize for the inconvenience this issue may have caused, and thank you for your continued support.
We have patched the issue and are monitoring our systems closely. We will provide an update as soon as the issue has been fully resolved.
We are currently investigating the following issue:
We will provide an update as soon as more information is available. Thank you for your patience.