Solana nearly froze on Wednesday morning when a routing glitch at a major data center provider knocked almost 29% of the network's staked tokens offline, staking platform Marinade Finance reported. The incident brought the network within about 20 million tokens of a freeze threshold that would have halted all transaction finality.
Solana stops finalizing transactions if more than one-third of staked tokens go offline. The incident left the network perilously close to that threshold, evoking memories of a five-hour outage in February 2024 that required a manual restart.
What Happened
The issue started with a bad internet route from a data center provider's Miami facility that then spread to data centers across Europe and Asia, cutting off validators in London, Amsterdam, Frankfurt, Singapore, and Tokyo. North America stayed online. The company fixed the issue in about 10 minutes, and traffic was flowing again by 4:16 a.m. UTC.
Roughly 90 validators were hit and together lost 333 SOL in rewards, a relatively small sum that will be covered by validator bonds. However, the potential damage from a full freeze would have been far more significant.
The Concentration Risk
One single network operator controlled more than a quarter of all the tokens people had locked up to secure the network, which was more than the prescribed safety limit. Almost all of those tokens went offline at the same time. Other companies lost another 14 million tokens in the same short period.
Most of the affected validators, including a major one called Helius, stayed offline for the full 33 minutes because their backup systems never switched on. This failure of redundancy systems is particularly concerning for a blockchain that has built its reputation on speed and reliability.
The Stakes of a Full Freeze
If delinquency had gone past one-third, nothing would have finalized for anyone holding SOL anywhere, and there is no bond for that kind of damage. The February 2024 halt took about five hours to restart, and a similar outage at current market levels would affect a much larger ecosystem.
Solana is one of the leading smart contract blockchains, with assets worth $4.3 billion locked in DeFi protocols operating on the network. The blockchain has positioned itself as a faster and cheaper alternative to Ethereum, but the recurring outage risk remains a vulnerability that competitors have not hesitated to point out.
A Warning for Proof-of-Stake Networks
The incident serves as a broader warning for proof-of-stake networks about the dangers of validator concentration. When a single network operator controls more than the prescribed safety limit of staked tokens, the entire network's stability depends on that operator's infrastructure. The fact that backup systems failed to activate at multiple validators suggests that redundancy planning in the Solana ecosystem needs improvement.
This event follows a series of security incidents across smaller blockchain networks, including the Harmony ONE exploit and the Ravencoin rollback crisis. While Solana's incident was an infrastructure failure rather than a security exploit, it underscores the diverse risks that blockchain networks face as they scale.
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