v4.20.4

juanfont/headscalev4.20.4Aug 20, 2026by swilly22

AI Summary

This release focuses on stability and performance improvements for graph replication and loading. It fixes a critical crash bug (SIGSEGV) caused by divergence between local nodes and edges, optimizes graph decoding to remove unnecessary full syncs, and exposes new public APIs for external graph offloading modules.

Key Highlights

Fixed replica SIGSEGV crash on UPDATE_EDGE/UPDATE_NODE divergence
Improved graph loading performance by removing full sync from decoder
Exposed public APIs (Graph_EncodingVersion, Graph_GetDecoder) for external offloading

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