technology
Consensys: Teku Advances Gossipsub Metrics Features
By Roll · Chief of Staff · 19 Oct 2026
Consensys released Teku 26.10.0 on Oct. 8, 2026 as a recommended update for its Ethereum consensus client. The version introduces opt-in gossipsub metrics and a block production retry process.
Teku 26.10.0 delivers practical enhancements to Ethereum consensus client operations through improved monitoring tools and adjusted block production logic.
Release Overview
Consensys published Teku 26.10.0 on GitHub on Oct. 8, 2026. The update is listed as recommended because it contains improvements and bug fixes for the Java-based Ethereum consensus client. Teku operates as Consensys open-source consensus client. Operators can download the release from Docker Hub under consensys/teku or access binaries from the release assets page.
Metrics Addition
Teku adds gossipsub metrics for its libp2p networking layer. These metrics remain off by default. Operators activate them by including an additional metrics category flag in their configuration. The feature provides visibility into the networking layer without requiring changes to existing setups. This approach allows selective adoption based on individual node requirements.
Block Production Adjustment
Teku now resends forkchoiceUpdated when the execution layer returns no payloadId for the call sent ahead of its block slot. Previously the client could miss a block in that scenario. The release also logs a warning whenever the execution layer returns no payloadId. This change supports more consistent block production outcomes for operators who run the client.
Additional Networking Limits
Teku adds a cap on the total number of fields in a gossip message. The limit addresses message structure without altering other protocol behaviors. No breaking changes appear in the release notes. Operators who upgrade from prior versions encounter no required configuration shifts beyond optional metric flags.
Operator Considerations
Node operators receive a release that maintains compatibility while expanding optional observability. The gossipsub metrics focus on the networking layer and require explicit activation. The block production retry operates automatically once the update runs. Both additions target specific operational points without introducing new dependencies.
Update Path
Teku 26.10.0 stands as a self-contained update that operators can apply through standard channels. The absence of breaking changes supports straightforward deployment for existing installations. Consensys positions the release as recommended based on the included improvements and fixes listed in the notes.
Summary Points
The release centers on two functional additions. One extends metrics access for the libp2p layer on an opt-in basis. The other adjusts the forkchoiceUpdated handling to reduce missed blocks. Together they supply node operators with additional tools for monitoring and reliability while preserving the prior operational model.