Node Restart

Overview

A node restart reloads blockchain client processes and reconnects them to local storage and the peer-to-peer network. A clean restart allows the client to flush database writes, close network sessions, and resume from a consistent checkpoint. An abrupt restart after power loss or forced termination may require database recovery, replay, or additional integrity checks.

Restarts are common during software upgrades, configuration changes, certificate renewal, and operating-system maintenance. Operators should confirm version compatibility and backup critical configuration before proceeding. Validator nodes need coordinated procedures because starting two instances with the same consensus key can create double signing, while extended downtime can cause missed duties.

After restart, the node may need to perform Node Synchronization, rebuild caches, reconnect peers, and validate recent blocks. A process listening on its RPC port is not yet ready. Health checks should confirm chain ID, finalized-block lag, peer count, database status, and role-specific readiness before load balancers or signing systems send production work.

Repeated restarts without diagnosis are a warning sign. Memory exhaustion, disk failure, corrupted state, or incompatible software will usually recur. Teams should escalate to Node Recovery when the node cannot maintain stable health. Logs and metrics from before and after the restart should be preserved so a transient symptom does not erase evidence of the underlying fault.

For Node Restart, the practical test is whether the documented evidence supports this conclusion: routine process recovery, but production readiness still requires synchronization, database, peer, and role-specific validation. Teams should retain the protocol version and underlying records needed to reproduce the Node Restart decision.