Ethereum’s Layer 2 network, Arbitrum, went down for the second time in less than five months after a hardware failure.

Arbitrum is back up at the time of writing, but the team has report some downtime during the last hours of September 1st. The timing of the tweets indicated that the network was down for about seven hours.

At the time, the Offchain Labs platform reported some sequencing issues that were preventing transactions from being processed during that period.

On January 10th, Arbitrum released a detailed report explaining what led to the short-term default. “The core problem was a hardware failure in our main sequencer node,” added that the backup sequencer redundancies, which would normally be under control, also failed due to an ongoing software update.

The network is designed back on Layer 1 Ethereum to process transactions if the sequencer crashes. Efforts have been made to secure all transactions confirmed by the sequencer before the crash. A total of 284 transactions recorded by the sequencer were prevented from being posted to the Ethereum chain.

This is a very minor breakdown by and large, but the team reminded users that the network is essentially still in beta.

“The Arbitrum network is still in beta and we will continue to refer to it as a test network as long as there are central points in the system.”

The team concluded that they are working on further decentralizing the network with “minimizing sequencer downtime” which will be rolled out in the coming weeks and months.

In mid-September last year, Arbitrum also experienced a similar sequencer failure when the system hung due to an error after executing a large number of transactions in a short period of time.

Arbitrum is an Ethereum Layer 2 network that uses Optimistic Rollup to process bulk transactions faster and cheaper. It launched as Arbitrum One in early September after a massive $ 120 million financing round.

According to data platform L2beat, Arbitrum is currently the most popular Layer 2 network with a total value of $ 2.62 billion, representing 47% of the L2 market share.

Source: L2beat

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