Solana came dangerously close to a network-wide halt on Wednesday after an internet routing failure temporarily pushed nearly 29% of the blockchain’s staked SOL offline, according to staking platform Marinade Finance.
The incident highlighted one of Solana’s most important infrastructure risks: if more than one-third of the network’s active stake becomes unavailable, validators can no longer reach the consensus required to finalize transactions. In that scenario, activity across Solana would effectively stop until enough validators return online.
Marinade said the blockchain came within roughly 20 million SOL of crossing that critical threshold.
Solana Validators Hit by Major Routing Glitch
The disruption began with an incorrect internet route connected to infrastructure provider Teraswitch’s Miami data center. The networking problem then propagated to facilities in Europe and Asia, affecting validators operating from locations including London, Amsterdam, Frankfurt, Singapore, and Tokyo.
North American infrastructure largely remained online during the incident.
Teraswitch reportedly corrected the routing issue within about 10 minutes, with normal traffic beginning to recover by 4:16 a.m. UTC.
However, several validators remained unavailable considerably longer because their backup systems failed to activate as expected.
Around 90 Solana validators were affected, according to Marinade. Together, they missed approximately 333 SOL in staking rewards.
The financial loss itself was relatively limited and is expected to be covered through validator bonds designed to compensate delegators when operators experience performance problems.
The broader systemic risk was significantly larger.
Why the One-Third Threshold Matters for Solana
Solana uses a proof-of-stake consensus system in which validators secure the blockchain using SOL delegated or staked to them.
As long as more than two-thirds of the network’s stake remains available and participating properly, validators can continue reaching consensus and finalizing transactions.
But if more than one-third of the stake becomes unavailable, finality can stop.
That means transactions across Solana may no longer become irreversible, effectively freezing the blockchain for users, DeFi protocols, exchanges, stablecoin transfers, and other applications operating on the network.
Marinade warned that validator compensation mechanisms would provide little protection against such a scenario because validator bonds can reimburse missed rewards but cannot prevent the wider consequences of a chain halt.
The platform also pointed to Solana’s February 2024 outage, when restarting the blockchain took roughly five hours.
Validator Concentration Raises New Concerns
The Wednesday incident also exposed another potential weakness: infrastructure concentration.
According to Marinade, a single network operator identified as AS2032 was responsible for infrastructure supporting more than one-quarter of Solana’s total staked tokens.
That concentration exceeded the network’s recommended safety limits.
Nearly all of that stake went offline simultaneously during the routing disruption.
Other infrastructure providers lost access to another approximately 14 million SOL during the same period, bringing the network much closer to the one-third failure threshold.
Helius, one of the major Solana validator operators affected by the incident, was among those that reportedly remained offline for the full 33-minute disruption because backup infrastructure did not successfully take over.
The event demonstrates that validator decentralization involves more than simply having a large number of independent operators. Those validators must also avoid relying heavily on the same internet providers, autonomous systems, data centers, geographic regions, and other infrastructure dependencies.
Solana DeFi Escaped a Much Larger Disruption
Solana remains one of the largest smart contract blockchains and supports approximately $4.3 billion in assets locked across decentralized finance protocols.
Its combination of high transaction throughput and relatively low fees has helped position Solana as one of Ethereum’s most prominent competitors, particularly across decentralized exchanges, memecoin trading, lending markets, liquid staking, and other DeFi applications.
However, Solana has also dealt with multiple network interruptions throughout its history.
Wednesday’s incident did not ultimately become another full outage, but the narrow margin between normal operation and losing finality may renew questions about the resilience of the infrastructure supporting the network.
The issue is especially important for DeFi users because blockchain availability is a fundamental assumption behind lending, leveraged trading, liquidations, decentralized exchanges, and stablecoin markets.
If the underlying chain stops finalizing transactions, smart contracts cannot operate normally regardless of whether individual DeFi protocols remain technically healthy.
A Warning for Solana’s Infrastructure
The latest incident ended without a blockchain-wide freeze, and the affected infrastructure eventually returned online.
Still, nearly 29% of Solana’s stake disappearing at the same time represents a significant stress test for the network.
It also illustrates how an infrastructure failure outside the blockchain itself, such as an internet routing error, can potentially become a consensus problem.
For Solana, improving validator diversity may therefore require reducing concentration not only among staking operators but also among hosting companies, network providers, autonomous systems, and geographic locations.
Wednesday’s near miss provided a clear reminder of the stakes.
Had just tens of millions more SOL gone offline, Solana could have crossed the one-third threshold at which transaction finality stops, potentially turning a short-lived internet routing problem into a network-wide blockchain outage.
