v0.16.0

highlights

database fingerprint checksum — a new database fingerprint checksum mechanism for verifying database state integrity, along with WAL checksum gauge metrics for improved observability. (#877, #890, #891)

control request replication via WAL — control requests are now replicated through the WAL state machine, ensuring consistency across the cluster. (#882)

leader hint support — when a client sends a request to a non-leader node, the response now includes a hint pointing to the actual leader, reducing unnecessary round-trips. (#883)

negotiated features — support for feature negotiation between client and server, enabling safe rollout of new capabilities. (#878)

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bug fixes

• delete idx file before txn to prevent dangling idx on crash (#920) — @mattisonchao
• prevent panic when reading empty WAL index file (#912) — @coderzc
• propagate WAL CRC chain across snapshot recovery (#901) — @mattisonchao
• prevent infinite loop in balanceHighestNode on selector error (#895) — @mattisonchao
• avoid unexpected dataServer join quorum (#880) — @mattisonchao
• fix type assertion panic in Cache.Get() when key not found (#881) — @labuladong
• eliminate data race in maelstrom message parsing (#918) — @mattisonchao
• eliminate data races on controller logger and term fields (#907) — @mattisonchao
• eliminate data race on leaderController.log via atomic term (#903) — @mattisonchao
• add read lock to WAL segment Flush to prevent data race with Close (#893) — @mattisonchao
• treat EOF as retriable error on write stream (#917) — @mattisonchao
• continue trying other shards when quarantining in leader rebalance (#908) — @mattisonchao
• re-sort node load ratios after recalculation (#894) — @mattisonchao
• use deterministic protobuf marshaling for notification checksum (#888) — @mattisonchao

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improvements

• add retry logic to follower stateApplier goroutine (#892) — @mattisonchao
• refactor follower controller for better lifecycle management (#887) — @mattisonchao
• dynamic log level changes now affect existing loggers (#914) — @mattisonchao
• upgrade log level from debug to warn on operation failure (#884) — @mattisonchao

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ci & build

• add manual Docker build & push workflow (#919) — @mattisonchao
• bump aquasecurity/trivy-action from 0.33.0 to 0.34.0 (#886) — @dependabot
• stabilize flaky TestControlRequestFeatureEnabled (#915) — @mattisonchao
• stabilize flaky TestLeaderHint tests (#916) — @mattisonchao

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full changelog: v0.15.3...v0.16.0