v4.20.4

getarcaneapp/arcanev4.20.4Aug 20, 2026by swilly22

AI Summary

This release addresses critical crash bugs in effect replication where replicas would SIGSEGV due to divergent nodes or edges, and significantly improves performance by optimizing the graph loading process using incremental matrix rebuilding instead of full syncs.

Key Highlights

Fixed replica SIGSEGV crashes caused by divergent nodes and edges during effect updates.
Optimized graph loading performance by removing full sync from the RDB decoder.
Exported new public APIs (Graph_EncodingVersion and Graph_GetDecoder) for external modules to manage graph dumps.

Full Release Notes

## What's Changed

### Bug Fixes
* fix(effects): stop replica SIGSEGV on UPDATE_EDGE/UPDATE_NODE divergence - replicas no longer crash when an effect references a node or edge that no longer exists locally; the mismatch is now detected and triggers a full resync instead (#2581)

### Performance
* remove full sync from decoder - transpose matrices are rebuilt incrementally as delta-matrix components are set during RDB decoding instead of forcing a full sync at the end, speeding up loading of persisted graphs (#2584)

### Improvements
* serializers: export Graph_EncodingVersion and Graph_GetDecoder - new public APIs let external modules (e.g. graph-offloading) stamp dumps with their encoding version and select the matching decoder on load (#2552)

**Full Changelog**: https://github.com/FalkorDB/FalkorDB/compare/v4.20.3...v4.20.4