The Ethereum Arbitrum layer 2 network suffered its second outage in less than five months after a hardware failure.
Arbitration breaks down
Arbitrum is currently operational again, but the team reported several breakdowns in the last hours of January 9. The timing of the tweets indicates that the network was down for about seven hours, but it could have been longer. At that time, the Offchain Labs platform reported issues with the sequencer that prevented transactions from being processed during that time.
On January 10, Arbitrum released a post mortem explaining what led to the brief outage. The main problem was a hardware failure in its main sequencer node. Backup sequencer redundancies that would typically take over also failed due to an ongoing software update. The network is designed to fall back to layer one Ethereum to process transactions in the event of a problem with its sequencer. However, he said the team worked hard to ensure the sequencer confirmed all transactions before going offline.
The sequencer is back online. Thank you very much for being patient with us while we resolve the issue. More details on what happened to follow.
— Arbitrum (@arbitrum) January 9, 2022
He will work on the decentralization of the network
The team concluded that they were working to further decentralize the network with a “dual sequencer downtime minimization path” being implemented in the coming weeks and months. Arbitrum experienced a similar sequencer outage in mid-September when a bug crashed the system after executing a large number of trades in a short time.
Arbitrum is an Ethereum Layer 2 network that uses optimistic rollups to process transactions in batches faster and cheaper. It launched in early September as Arbitrum One after a $120 million funding round. Arbitrum is currently the most popular layer two network with a TVL of $1.8 billion. Some of the known Dapps on Arbitrum are Dopex, GMX, Abracadabra and Curve.