36670582312
80%

Ran 30 Sep 2026 05:55AM UTC

Jobs 1

Files 66

Run time 1min

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Committed 28 Sep 2026 03:48PM UTC coverage: 82.665% (-0.07%) from 82.737%

Build # 36670582312

Build Type

push

github

Committed by

web-flow

Commit Message

[FIXED] MQTT: reload stops QoS 1/2 delivery when max_ack_pending is unset (#8671)

Resolves #8661.

A reload that treats the `mqtt` options as changed calls
`mqttUpdateMaxAckPending`, which assigned the configured
`max_ack_pending` to every existing session as is. When the option is
not set that is 0, and `trackPublish` then refuses a packet ID for every
QoS 1/2 message. New sessions were fine because `mqttSessionCreate`
falls back to `mqttDefaultMaxAckPending`; this applies the same fallback
on reload.

The reporter saw it only with `verify_and_map` because a `tls {}` block
makes every reload re-apply the MQTT options. The test covers that no-op
reload and a reload changing `ack_wait` without TLS; both fail without
the fix. `go test ./server -run TestMQTT` passes.

Coverage Stats

72040 of 87147 relevant lines covered (82.66%)

312384.15 hits per line

Coverage Regressions

Lines	Coverage	∆	File
92	78.17	-2.16%	src/github.com/nats-io/nats-server/server/raft.go
62	78.06	-0.58%	src/github.com/nats-io/nats-server/server/filestore.go
21	83.49	0.36%	src/github.com/nats-io/nats-server/server/jetstream_cluster.go
12	73.6	0.05%	src/github.com/nats-io/nats-server/server/jetstream_api.go
6	87.68	-0.04%	src/github.com/nats-io/nats-server/server/consumer.go
3	85.02	-0.15%	src/github.com/nats-io/nats-server/server/events.go
2	86.04	0.06%	src/github.com/nats-io/nats-server/server/accounts.go
2	89.48	-0.08%	src/github.com/nats-io/nats-server/server/leafnode.go
2	77.81	0.12%	src/github.com/nats-io/nats-server/server/opts.go

Jobs

ID	Job ID	Ran	Files	Coverage
1	36670582312.1	30 Sep 2026 05:55AM UTC	66	82.66	GitHub Action Run

nats-io / nats-server / 36670582312
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