Fix data race when updating leader#6150
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derekcollison merged 1 commit intomainfrom Nov 20, 2024
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Signed-off-by: Maurice van Veen <github@mauricevanveen.com>
MauriceVanVeen
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Jan 9, 2025
Should solve this data race, where `rn.updateLeader(noLeader)` was
called without holding the lock.
```
==================
WARNING: DATA RACE
Write at 0x00c0011d6da8 by goroutine 238071:
github.com/nats-io/nats-server/v2/server.(*raft).updateLeader()
/home/travis/build/nats-io/nats-server/server/raft.go:3212 +0x1fa
github.com/nats-io/nats-server/v2/server.TestJetStreamClusterDesyncAfterErrorDuringCatchup.func2()
/home/travis/build/nats-io/nats-server/server/jetstream_cluster_4_test.go:3970 +0x1f2
github.com/nats-io/nats-server/v2/server.TestJetStreamClusterDesyncAfterErrorDuringCatchup.func3()
/home/travis/build/nats-io/nats-server/server/jetstream_cluster_4_test.go:4046 +0xc56
testing.tRunner()
/home/travis/sdk/go1.23.3/src/testing/testing.go:1690 +0x226
testing.(*T).Run.gowrap1()
/home/travis/sdk/go1.23.3/src/testing/testing.go:1743 +0x44
Previous read at 0x00c0011d6da8 by goroutine 238374:
github.com/nats-io/nats-server/v2/server.(*raft).processAppendEntry()
/home/travis/build/nats-io/nats-server/server/raft.go:3351 +0x124c
github.com/nats-io/nats-server/v2/server.(*raft).processAppendEntries()
/home/travis/build/nats-io/nats-server/server/raft.go:2029 +0x1f2
github.com/nats-io/nats-server/v2/server.(*raft).runAsFollower()
/home/travis/build/nats-io/nats-server/server/raft.go:2044 +0x446
github.com/nats-io/nats-server/v2/server.(*raft).run()
/home/travis/build/nats-io/nats-server/server/raft.go:1906 +0x557
github.com/nats-io/nats-server/v2/server.(*raft).run-fm()
<autogenerated>:1 +0x33
github.com/nats-io/nats-server/v2/server.(*Server).startGoRoutine.func1()
/home/travis/build/nats-io/nats-server/server/server.go:3885 +0x59
```
Signed-off-by: Maurice van Veen <github@mauricevanveen.com>
neilalexander
added a commit
that referenced
this pull request
Jan 9, 2025
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Should solve this data race, where
rn.updateLeader(noLeader)was called without holding the lock.Signed-off-by: Maurice van Veen github@mauricevanveen.com