22212128311
84%

Ran 20 Feb 2026 06:12AM UTC

Jobs 1

Files 61

Run time 1min

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Committed 19 Feb 2026 03:38PM UTC coverage: 83.794% (-0.2%) from 84.003%

Build # 22212128311

Build Type

push

github

Committed by

web-flow

Commit Message

NRG: Fix cluster size drop to 1 on replaying EntryAddPeer after restart (#7850)

On restart, replaying EntryAddPeer could incorrectly leave a raft node
at cluster size 1 instead of restoring the expected size and quorum from
persisted state.
This bug could lead to the following scenario: a node in a 3 node
cluster could restart, reset set cluster size to 1. If the node did not
receive any message from other nodes, it could campaign to become
leader. Being in a single node cluster, it would win the election.
Resulting in the original cluster splitting into two clusters (or two
leaders at the same time).
Specifically, if an EntryAddPeer was replayed on from the log, it would
overwrite the cluster size and quorum to 1. The peer set is now restored
before the log is replayed, and it is taken from the snapshot (if no
snapshot is present then we fallback to peer.idx).
If a log entry that changes membership is replayed, it will now update
the cluster and quorum size correctly.

Signed-off-by: Daniele Sciascia <daniele@nats.io>

Run Details

74376 of 88761 relevant lines covered (83.79%)

353483.46 hits per line

Uncovered Existing Lines

Lines	Coverage	∆	File
2	87.96	-0.16%	src/github.com/nats-io/nats-server/server/auth.go
2	93.84	0.16%	src/github.com/nats-io/nats-server/server/gateway.go
2	63.16	-10.53%	src/github.com/nats-io/nats-server/server/jetstream_events.go
2	98.52	-1.48%	src/github.com/nats-io/nats-server/server/jetstream_versioning.go
2	87.16	0.04%	src/github.com/nats-io/nats-server/server/monitor.go
2	86.01	0.05%	src/github.com/nats-io/nats-server/server/stream.go
3	90.2	-0.12%	src/github.com/nats-io/nats-server/server/leafnode.go
4	86.35	-0.05%	src/github.com/nats-io/nats-server/server/events.go
5	93.61	-0.04%	src/github.com/nats-io/nats-server/server/client.go
5	89.7	0.03%	src/github.com/nats-io/nats-server/server/server.go
6	78.64	-0.02%	src/github.com/nats-io/nats-server/server/opts.go
14	82.92	0.35%	src/github.com/nats-io/nats-server/server/memstore.go
15	88.15	0.06%	src/github.com/nats-io/nats-server/server/consumer.go
15	83.38	0.53%	src/github.com/nats-io/nats-server/server/filestore.go
110	73.65	-0.27%	src/github.com/nats-io/nats-server/server/jetstream_api.go
174	61.78	-9.78%	src/github.com/nats-io/nats-server/server/reload.go
334	86.55	-1.62%	src/github.com/nats-io/nats-server/server/raft.go
1104	82.32	-0.1%	src/github.com/nats-io/nats-server/server/jetstream_cluster.go

Jobs

ID	Job ID	Ran	Files	Coverage
1	22212128311.1	20 Feb 2026 06:12AM UTC	61	83.79	GitHub Action Run

nats-io / nats-server / 22212128311
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