On 9th May, Chargebee suffered a major outage between 13:50 UTC and 14:00 UTC. This was due to a bug in the internal monitoring code which resulted in quick spurt in memory consumption in our app servers. This resulted in the app servers becoming unresponsive to incoming requests.
We quickly added app servers to reduce the impact. We also blocked further requests to the particular action immediately. We have also added additional alerts to identify such issues proactively.
We apologize for the disruption caused for your business during this time.