v2.1.0 release

Bug fixes:

• calc_server null pointer exception (#387).

Features:

• Test mode flag in order to skip internal constraints for testing purpose (#385).
• User context for extended append_entries API (#388).
• expand API for buffer (#389).

v2.0.0 release

Bug fixes:

• Peer's next log index overflow (#227).
• Config loss caused by the restart during joining cluster (#232).
• Missing configuration log during snapshot creation (#244).
• Incorrect log index in get_peer_info (#246).
• Duplicate save_state call during vote (#262).
• New member's target priority issue during catch-up (#270).
• Missing role change during pre-vote (#277).
• Memory leak caused by internal commit data (#278, #296).
• Debugging log overflows (#289, #290, #363).
• Leadership validity checking (#291).
• Race between term update and client request (#294).
• Missing commit results for auto-forwarding in async mode (#350).
• Disruptive leader election during a leadership takeover request (#357).
• Segfault during snapshot installation (#373).
• Missing RemovedFromCluster callback (#382).

Features:

• Background async snapshot IO (#228).
• New APIs to pause/resume state machine execution (#234).
• Callbacks for tracking lifecycles of ASIO worker threads (#245).
• Full consensus mode (#248).
• Selective quorum support (#263).
• Extended append_entries API (#273).
• Parallel log appending (#283).
• New API to create a snapshot manually (#360).
• Custom resolver (#361).
• Automatic timestamp generation for each log (#368).
• Randomized snapshot creation timing (#372).

v1.3.0 release

Bug fixes:

• Stale peer info cached in the leader (#182).
• Race condition on handling background commit (#187).
• Invalid destruction order of singleton instances (#193).
• Order inversion between append and commit threads (#215).
• Handle snapshot read failure and retry (#213, #217).

Improvements:

• Parallel and thread-safe auto-forwarding (#189).
• New API to get peer info (#204).
• New option to prevent a server with a lagging state machine from being a leader (#208).

v1.2.0 release

Bug fixes:

• Stale leader ID issue (#116).
• Removing server related issues (#123, #129).
• Auto-forwarding bugs (#132, #133).
• Commit order inversion bug (#140).
• Incorrect Asio remote endpoint handling (#165).
• Potential race around busy flag (#173).
• Potential inefficiency during commit (#148).
• Other minor bugs.

Improvements:

• Automatic quorum size adjustment for 2-node cluster (#119, #121, #141).
• Support designated successor for the leadership yield (#126).
• New API for leadership take-over (#127).
• Support negative numbers for batch size hint (#128).
• Support global thread pool for multiple instances (#136, #137, #138, #139).
• Support callback function for launcher init (#147).
• Automatic leadership transfer (#156).

v1.1.2 release

Bug fixes:

• Incorrect leadership yield issue on small (2-node) cluster (#95, #96).
• Removed server issue (#97, #99, #101, #102, #110).
• Potential corruption/crash issue (#105, #106, #107, #108).
• Other minor issues.

Improvements:

• Custom term counter (#114).
• Event callback (#115).

v1.1.1 release

• Fixed a bug on failing commit on removing server, due to early closed connection (#90 and #92)
• Fixed a bug about pre-commit & commit order inversion (#93 and #94)
• Other minor fixes.

v1.1.0 release

Bug fixes:

• Various test issues.
• Handling explicit null returned by Log store.
• Asio worker exception handling (#42, #55).
• Buffer serializer validity checking bug (#45).
• Crash on response meta callback (#52).
• Rollback sequence bug (#57, #62).
• Bug on newly joined node being stepped down (#78).
• Other minor fixes.

Improvements:

• New protocol for custom notification (#47).
• Active leadership takeover (#50).
• Allow zero-priority member to be a temporary leader (#51).
• Reducing lock contention (#74)
• Persistent status regarding election timer on/off (#81, #82).
• Other minor features.

v1.0.0 release

The initial stable release.