Standard — Zcash - Mainnet & Testnet - Upgrade zebra to v5.1.1

Scheduled for Jun 17, 11:00 - 15:00 UTC

Scheduled

We are upgrading our Zcash Mainnet infrastructure to zebra v5.1.0.

This release addresses a sync stall that could cause nodes to hang during initial block download, and includes several performance and correctness fixes.

During the maintenance window, brief interruptions to RPC availability may occur.

RPC Changes:

getrawmempool — Performance improvement: the mempool index was being unnecessarily rebuilt per transaction on each call. Responses should now be faster under load.

getpeerinfo — Extended with additional fields: subver, version, services, lastrecv, banscore, and connection_state.

https://github.com/ZcashFoundation/zebra/releases/tag/v5.1.1

Posted Jun 12, 2026 - 16:36 UTC

This scheduled maintenance affects: Zcash (Zcash Mainnet - JSON RPC API, Zcash Testnet - JSON RPC API).