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Solana’s major outage was caused by a denial-of-service attack targeting DEX offering

Updated: Jul 25, 2024
Published: Sep 21, 2021
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Solana has published a blog post explaining the outage that occurred on its network last week.

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Solana’s outage was due to a DDoS

The Solana Foundation has conducted an in-depth post-mortem to determine the cause of a major outage that affected the blockchain last week. According to the foundation, it was caused by a denial-of-service attack targeting decentralized exchange (DEX) offering.

In a blog post yesterday, the Solana Foundation said, “The cause of the network stall was, in effect, a denial of service attack. At 12:00 UTC, Grape Protocol launched their IDO on Raydium, and bots generated transactions which flooded the network. These transactions created a memory overflow, which caused many validators to crash forcing the network to slow down and eventually stall. The network went offline when the validator network could not come to agreement on the current state of the blockchain, which prevented the network from confirming new blocks.”

The activity overwhelmed the Solana network with a transaction load of more than 400,000 per second. Solana said the unbounded growth of the forwarder queues and resource-heavy blocks led to numerous forks being automatically proposed to the network.

Solana’s outage lasted for nearly 17 hours

The outage on the Solana network is the blockchain’s longest, as it lasted for roughly 17 hours between September 14 and 15. SOL is one of the best performing cryptocurrencies in recent weeks.

However, its price dropped below the $150 mark following the major outage on the network. Solana engineers worked together to fix the issue, with a hard fork passed after achieving more than 80% support from the network stakers.

“One of the biggest benefits of blockchains is that, even in complete liveness failure for any reason, the validators are individually responsible for recovering the state and continuing the chain without relying on a trusted third party. On a decentralized network, each validator works to bring it back and has their work guaranteed and verified by everyone else,” the Solana Foundation added.

 

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