Solana came within five percentage points of a full network halt on Wednesday morning after a single routing glitch at a hosting provider knocked 28.83% of all staked SOL offline in minutes. Marinade Finance, a staking protocol, reconstructed the incident and found the network got 86% of the way to the 33.34% line where Solana stops finalizing transactions. No user funds were at risk, and validator bonds cover the lost rewards.
The Teraswitch failure
The fault began at Teraswitch, a hosting provider popular with Solana validators. A broken route left its Miami site, then spread through an internal relay in Amsterdam. Twelve sites from London to Tokyo lost their connection. North America never felt it. Teraswitch found the bug in about 10 minutes. Full recovery took 33 minutes. At the peak, roughly 20 million SOL of online stake stood between the network and a freeze.
Why the cap didn't hold
Around 90 validators went dark. Their combined lost rewards came to 333 SOL, about $25,600 at current prices. Validator bonds will cover that at the end of the epoch. One ASN, AS20326, hosts 27.34% of everything staked on Solana. During the fault, 94% of that stake went offline at once. The Solana Foundation Delegation Program (SFDP) caps any single ASN at 25%. That cap is already broken. Another 14 million SOL dropped in the same minutes on unrelated providers. Marinade could not explain the overlap.
Marinade's own concentration problem
Of 74 validators Marinade measured, only three switched to a second site. The rest sat offline until the internet healed. Helius, Solana's second-largest validator, stayed down all 33 minutes. Marinade admitted its own numbers look similar, with four ASNs holding two-thirds of the stake it allocates. It now plans tighter caps per ASN and data center, and will publish which validators run automatic failover.
SOL trades near $76.46, up 0.6% on the day. The market shrugged. In November 2022, German host Hetzner kicked 1,000 validators offline and pushed delinquent stake past 20%. Wednesday's fault went further. The chain's last full network halt, in February 2024, ended a 351-day uptime streak and took about five hours to fix. Validators are preparing the Alpenglow finality upgrade, due by October, which promises faster confirmations. The open question is whether stake spreads out before the next bad route finds it.
