Crypto exchange Coinbase (Nasdaq: COIN) has explained how an AWS data center cooling failure triggered a service outage that disrupted trading, exchange access, and customer account data across the platform. Coinbase CEO Brian Armstrong addressed the incident on X, while engineering lead Rob Witoff detailed the recovery process and customer impact.

“We experienced an outage at Coinbase last night, which is never acceptable,” Armstrong wrote on May 8. He added that most Coinbase systems were designed to withstand downtime in one AWS Availability Zone, but the centralized exchange did not respond that way during the outage. “It is possible to make exchanges resistant to AZ failures, but this can introduce latency delays that are not desirable along with breaking customer co-location,” Armstrong stated, adding:

“Given this incident, we’ll revisit these tradeoffs to ensure we’re giving you the best possible venue to trade. At a minimum, the duration of an outage should be able to be reduced considerably when an AZ move is needed.”

Armstrong noted that Coinbase will review how it balances exchange speed, customer co-location, and recovery time after infrastructure failures. His comments focused on reducing the impact and duration of future outages affecting customer access and trading activity.

Coinbase engineering lead Rob Witoff posted on X that the disruption began late on May 7, when internal systems started failing, and emergency teams began investigating. The outage affected spot trading, Prime, International, and derivatives exchanges. Customers also experienced problems accessing exchange services, placing trades, and viewing account balances.

Witoff explained that trading was halted after exchange systems could not continue operating safely during the infrastructure disruption. He also noted that internal messaging systems slowed, causing some account information to lag until the recovery process caught up. He acknowledged:

“Losing access to your account, even temporarily, is unacceptable.”

Recovery was handled in stages rather than all at once. Coinbase moved affected workloads away from the troubled area, restored the systems needed to process trades, and allowed delayed customer data to catch up. Markets reopened carefully, starting with cancel-only mode, followed by product checks, auction mode, and then restored trading on Coinbase Exchange.

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