Fix concurrent snapshot finalization race (#663)
Sole Author: Patrick Ribbsaeter (@patrickswedish) · Immutable Commit SHA: 503deae0a73c307170f913961974eedbae496442
C++ Raft consensus state-machine fix serializing concurrent snapshot finalization callbacks so overlapping InstallSnapshot RPC streams cannot corrupt committed state.
PR #663
Merged Mainline
503deae
Immutable Git SHA
C++
Systems
Linux Raft Suite Green
CI & Test Matrix
01 · Engineering problem
The failure mode
Concurrent snapshot installation and normal AppendEntries heartbeats could race during snapshot sync finalization in NuRaft, corrupting state-machine commit index invariants.
02 · Technical response
What changed
- 01Synchronized snapshot finalization state transitions against concurrent replication handlers in NuRaft's C++ core.
- 02Added deterministic multi-threaded Raft snapshot race regression tests.
03 · Verified outcome
Evidence-backed result
- ✓Prevented concurrent snapshot sync finalization races in eBay's NuRaft consensus engine.
- ✓Merged upstream into eBay/NuRaft as commit 503deae0a73c307170f913961974eedbae496442.
04 · Cryptographic Git record
Immutable source evidence
Independent open-source engineering authored solely by Patrick Ribbsaeter (@patrickswedish). Company and project names identify the public repository context only under nominative fair use. No employment, client, vendor, or partnership relationship is implied unless explicitly stated.