Helium community group resolves consensus error after 4-hour outage


The Web of Issues (IoT) blockchain Helium shut down for about 4 hours on July 11 as a consequence of validator outages from a software program replace, inflicting delayed transaction finality.

Throughout the outage, gadgets transferring knowledge over the community weren’t affected, however miner rewards and token transfers had been left pending. The group resolved the problem by skipping the blockchain ahead by one block and resuming regular features.

At 10:20 am EDT, the Consensus Group stopped producing blocks at block peak 1435692 on the Helium (HNT) blockchain, in accordance to a standing replace. Missing community consensus, token transfers couldn’t be accomplished, and new blocks weren’t being produced.

Helium is an IoT community that makes use of bodily radio hotspots to permit customers to connect with their gadgets from wherever there’s radio protection. On the Helium community, a Consensus Group consists of 43 validator nodes randomly chosen in fastened intervals to present community consensus.

Within the postmortem for the occasion, Helium engineers cited two causes validators stopped creating consensus on the community.

First, a difficulty with a July 8 software program replace for validators contributed to the issue. The v1.12.3 replace was designed to offer help for the 5G Cell subnetwork and its MOBILE token.

Moreover, a “native community outage” was additionally responsible. Within the undertaking’s Discord channel, Helium moderator “Digerati” defined {that a} excessive focus of validators randomly chosen because the Consensus Group on the time of the outage was operating on the identical Amazon Internet Service (AWS) community, which skilled technical difficulties.

AWS is a worldwide cloud computing and knowledge storage service that can be utilized to boost laptop networks like Helium.

A Helium group moderator explains an AWS outage affected validators.

Compounding the issue was the failure of an auto-skip function that ought to have chosen a brand new Consensus Group routinely. The group said that “a recognized concern prevented the auto-skip function from working as anticipated.” Nevertheless, it’s not clear what the “recognized concern” is that the group referred to.

Though the community couldn’t select a unique Consensus Group, it was designed with the flexibility to skip the blockchain a block ahead “to mitigate conditions similar to these,” based on a ten:56 am ET announcement from the group.

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By 1:45 pm ET, new block manufacturing began with block quantity 1435693. The group mentioned it labored carefully with validator operators to make sure they had been synced appropriately and launched a brand new software program replace.

HNT is down 4.1% over the previous 24 hours, buying and selling at $8.76 in accordance to CoinGecko. It’s down 84% from its November 2021 all-time excessive.