Summary
At approximately 10:39AM CT, September 29 2025, we observed system-wide degradation creating latency for transaction processing and observability. Latency was resolved for most customers by about 13:30PM CT, Sep 29, 2025.
At 4:43AM CT, September 30 2025, we observed a similar system degradation. Latency was resolved for customers by 13:23PM CT, September 30 2025.
What Happened
- A confluence of several issues generated a number of errors in our system. These factors included a change in the way we manage database partition rotations, an upgrade of a core library, and the interaction of some services with kubernetes.
- These errors caused some services to crash, and although our infrastructure is fault-tolerant and can recover from such crashes, the degree of crashing put pressure on our infrastructure in a way that manifested as latency in transaction processing, and a delay in transaction observability.
What we are doing about this:
- We rolled back the upgrade made to the affected third-party library.
- We are adding and improving alerting on affected services to provide clearer visibility to the teams that are responsible for those services.