Breaking: EOS Blockchain Grinds to Halt as Software Bug Freezes Transactions

Ethereum developers have delayed the long-awaited Constantinople hard fork in response to potential security vulnerabilities in one of the upgrades. | Source: Shutterstock

The EOS blockchain has ground to a halt after an apparent bug in the mainnet software caused the network to pause unexpectedly and indefinitely.

According to a post from EOS New York published on behalf of the top 21 block producers and standby nodes, the mainnet unexpectedly paused at 9:56 UTC, after which block producers initiated a conference call to identify and discuss the issue. At 10:57 UTC, standby block producers turned off their nodes and backed up blockchain data to help ensure that no network history would be lost.

Developers identified the problem at 13:02 UTC, and an update posted on the EOS Mainnet Updates Telegram channel stated that EOS creator is developing a software patch.

“Root cause was due to how deferred transactions were handled. Fix is being released shortly by BlockOne.”

That software release, which will be issued under tag 1.0.5, will introduce a nodeos fix. Once block producers have upgraded their nodes, blocks will be replayed until the last irreversible block — 1027597, according to — and block producers will sync to each other. Finally, the chain will be reopened to public access.

As reported, the EOS network had only been activated on June 14, and this network fault came less than 48 hours after the blockchain went live.

While block producers have been taking great pains to keep users in the loop about the state of the network, the fact that the blockchain is currently being debugged over a conference call has highlighted why many critics have argued that EOS is not a sufficiently-decentralized cryptocurrency.

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Last modified: March 4, 2021 5:08 PM

Josiah Wilmoth: Josiah is the former U.S. Editor at, where he focused on financial markets. He lives in rural Virginia. Connect with him on LinkedIn or email him directly at josiah.wilmoth(at)