Solana Nearly Loses Finality After 28.83% Stake Goes Offline
TL;DR:
- A routing error at Teraswitch took 28.83% of Solana’s stake offline, coming close to the critical 33.34% threshold.
- Autonomous system AS20326 concentrates 27.34% of the network’s total stake, above the 25% limit set by the Solana Foundation.
- Around 90 validators were affected and collectively lost 333 SOL in rewards during the 33 minutes the incident lasted.
Solana was 4.51 percentage points away from losing the ability to finalize transactions on Wednesday morning. A configuration error in a default route at hosting provider Teraswitch took 28.83% of the network’s stake offline, when the threshold at which the chain stops finalizing blocks is 33.34%. The network reached 86% of the way toward a complete halt.
Teraswitch published a technical report explaining the origin of the failure. The company uses an internal default route to indicate that an edge router can reach the internet, and each site normally prioritizes the one originated by its own routers. A route from its Miami headquarters was propagated without its metric or its communities, and a route reflector in Amsterdam distributed it toward Europe and Asia-Pacific.
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