v4.20.4

Hmbown/Codewhalev4.20.4Aug 20, 2026by swilly22

AI Summary

This release focuses on stability and performance, fixing a critical SIGSEGV crash in replicas caused by divergence and optimizing graph persistence loading. It also exposes new public APIs for external modules to manage graph encoding versions.

Key Highlights

Fixed SIGSEGV crash in replicas during UPDATE_EDGE/UPDATE_NODE divergence
Improved persistence loading speed by removing full sync from the decoder
Added public APIs for external modules to stamp dumps with encoding versions

New Features

Public APIs: Graph_EncodingVersion and Graph_GetDecoder

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