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Solana nearly froze as a single routing error took 29% of the network stake offline

Infographic showing nearly 29% of Solana stake offline versus an approximately 33.3% finality-halt threshold, with continued block production, skipped slots above 32%, non-vote throughput falling below 300 transactions per second and 33-minute provider recovery.

The Solana network saved producing blocks on Aug. 12 when an infrastructure failure stopped validators representing nearly 29% of network stake from voting, in response to a Solana Foundation account revealed Sept. 14.

Independent monitoring discovered that the chain remained dwell, but its efficiency deteriorated: extra chief slots have been skipped, transaction throughput fell sharply, and settlement finality was delayed.

The disruption started at Teraswitch, which the Foundation described as Solana’s largest infrastructure supplier. A Teraswitch postmortem traced the outage to a stale default route left on a Miami edge router, with Teraswitch’s supplier site visitors absolutely recovering 33 minutes after the first alarm.

Routine transit-provider upkeep activated that route, whereas transposed values in a routing coverage utilized a “no-export” instruction towards Europe and Asia-Pacific.

In sensible phrases, the unhealthy route unfold throughout Teraswitch’s network and prevented affected information facilities from reaching the Internet by means of wholesome native routers. Twelve websites throughout Europe and Asia-Pacific misplaced Internet and inter-site connectivity, together with infrastructure internet hosting Solana validator and RPC nodes.

Independent blockchain-risk monitoring agency Metrika broadly corroborated each the scale of the disruption and continuous block production. Its information confirmed skipped slots rising above 32% and non-vote transaction throughput dropping under 300 per second from a typical vary of roughly 1,100 to 1,300.

Metrika’s observer additionally recorded about half an hour during which newly produced blocks had not but reached finality, the level at which their transactions turn into irreversible. The backlog finalized as connectivity returned.

Solana prevented a chain-wide manufacturing halt, however customers and methods relying on fast settlement confronted materially weaker efficiency.

Infographic showing nearly 29% of Solana stake offline versus an approximately 33.3% finality-halt threshold, with continued block production, skipped slots above 32%, non-vote throughput falling below 300 transactions per second and 33-minute provider recovery.
Infographic exhibits Solana’s slim finality margin throughout the Aug. 12 Teraswitch routing failure, alongside continued block manufacturing, skipped slots, and decreased transaction throughput.

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Solana wants greater than 66% of stake voting to keep up consensus finality. The roughly 29% offline share stayed about 4% to five% under the corresponding 33% finality-halt threshold, in response to Metrika.

The Foundation stated Teraswitch had hosted 38% of network stake in 2025 and that its group decreased the supplier’s share under 30% earlier than the outage. That internet hosting share and the incident’s delinquent stake estimate measure various things, although each spotlight focus danger.

Many individually operated validators misplaced connectivity collectively as a result of they shared one supplier failure area.

Teraswitch later deployed provider-side hardening that day so an invalid route can now not cease websites from utilizing wholesome native edge routers. Its September postmortem stated extra route monitoring remained in progress, leaving infrastructure range and observability as persevering with resilience exams.

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