Coinbase halted parts of its trading platform on May 8 after an AWS data center cooling failure disrupted critical exchange infrastructure. CEO Brian Armstrong said multiple chillers failed inside an AWS facility, causing overheating that impacted trading access, balance displays, and order execution. The outage forced Coinbase to reassess how its exchange handles infrastructure failures during volatile market conditions. According to Armstrong, most systems handled the AWS Availability Zone disruption as designed, but the centralized exchange infrastructure failed to maintain normal operations.
Cancel-Only Mode for Hours
Coinbase moved markets into "Cancel Only" mode for several hours, preventing users from opening new trades while allowing order cancellations. Customers also reported delayed balance updates and temporary connection failures. The disruption affected Coinbase Exchange, Prime, International, and derivatives products. Armstrong noted that exchange systems use architectures focused on low latency and customer co-location, but those systems involve tradeoffs during large infrastructure failures. He said Coinbase would revisit those tradeoffs after the outage and aims to reduce downtime during future Availability Zone migrations.
Overnight Recovery Effort
Coinbase engineering lead Rob Witoff explained how the company restored services. Internal systems began failing late on May 7, triggering emergency recovery procedures. Coinbase shifted workloads away from the affected AWS infrastructure, then restored trading systems gradually — first enabling cancel-only functionality, then moving into auction mode, and finally restoring full trading after additional product checks. Witoff acknowledged that customers temporarily lost access to accounts and trading functions, and delayed internal messaging systems slowed balance synchronization.
Notably, the outage arrived shortly after Coinbase released weaker-than-expected first-quarter earnings and announced plans to reduce its workforce by 14%. Despite those developments, Coinbase reported an 8.6% crypto trading market share during the quarter, and retail derivatives revenue surpassed $200 million annually. AWS later confirmed the disruption stemmed from rising temperatures inside a northern Virginia data center, saying it increased cooling capacity and redirected traffic during recovery.