Coinbase-backed Base back online after almost two-hour consensus halt
Base, the Ethereum layer-2 backed by Coinbase, recovered after a near two-hour pause in block production on Thursday caused by a consensus issue that led to an invalid block being sequenced.
What happened
- Base’s status page first flagged “unhealthy block production” at 16:03 UTC. The network stopped creating new blocks after block 47,806,542.
- Engineers isolated the problem to consensus: an invalid block had been sequenced, which halted new block creation. Around two hours later Base announced on X that “blocks are being produced normally” and that recovery had been broadly verified across the ecosystem.
- The team said any remaining stuck nodes would recover after a restart and resync, and internal nodes had already resumed syncing.
Safety, response and follow-up
- Base creator Jesse Pollak reassured users that “funds are safe,” while conceding that “a halt is not okay” for a platform aiming to support 24/7 global finance. The team said it has patched the root cause and will publish a full post-mortem describing how the invalid block entered sequencing, why production stopped, and what checks will change to prevent recurrence.
- Operators of ecosystem nodes were asked to restart to recover syncing; that step helped infrastructure providers return to normal once sequencing resumed.
Timing and the Beryl upgrade
- The outage came just before Base’s scheduled Beryl upgrade. After the chain recovered, the Beryl upgrade went live. Beryl reduces the standard Base-to-Ethereum withdrawal delay from seven days to five and introduces a native B20 token standard—built into Base’s node software—for assets such as stablecoins and real-world tokens.
Why it matters
- Base is one of the busiest L2s supporting trading, payments, apps and token transfers. A pause in block production effectively freezes on-chain activity—delaying transactions and disrupting wallets, exchanges, bridges and dApps that rely on fresh blocks.
- The incident will renew scrutiny of sequencer design and uptime—critical considerations as Base becomes more central to Coinbase’s broader product strategy and institutional use cases. For example, JPMorgan has launched JPM Coin on Base to enable faster institutional payments and continuous settlement—use cases that depend on high availability and predictable recovery procedures.
A pattern to watch
- This isn’t Base’s first outage: in August 2025 the network had a 33-minute outage after a sequencer handoff problem, which prompted infrastructure changes and additional testing. Other networks have faced similar stalls this year—highlighting that even large L2s can encounter edge-case failures.
What’s next
- Base says block production has returned to normal and the root cause has been patched. The crypto community will be watching closely for the promised post-mortem, looking for a clear explanation, technical fixes, and measures that reduce the chance of another halt.
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