Cardano: Why 60% of the Network’s Nodes Went Offline?
The Cardano blockchain suffered an anomaly on Sunday night (02:00 BST, between block 8300569 and 8300570) that caused nearly 60% of all active nodes to remain offline for a short period of time.
Although the blockchain was not shut down, there were delays in transactions. But what happened and what was the cause?
“A few hours ago, over half of all Cardano nodes went offline. That’s why decentralization matters” and shared the chart below.
As the chart shows, the network recovered to about 87% in a short period of time. However, the cause of the incident remained unknown for quite a long time. At the time of writing, Cardano’s creator, Charles Hoskinson, had also yet to comment.
A statement from Cardano’s development company, Input Output Global (IOG), provided an explanation for the phenomenon. The company explained that an error caused nodes to break and reboot more than 50% of them.
“This affected the relay nodes and the nodes producing blocks – the edge nodes do not appear to have been affected“, said IOG, which explained that this appears to have been caused by a temporary fault that triggered one of two reactions in the node – some simply disconnected while others rebooted.
As the company points out, the impact was fairly minor – “similar to delays that occur during normal operations.”
Most nodes recovered automatically without human intervention and performed a reboot, depending on the choice of staking pool. However, the company promises to further investigate the cause of the anomaly and implement additional monitoring logging measures in addition to “regular” monitoring procedures.