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@@ -579,6 +579,9 @@ Note: **v3.5 will deprecate `etcd --log-package-levels` flag for `capnslog`**; `
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- necessary in the situation in which a learner has been promoted (i.e. is now a voter) but has not learned about this yet.
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- Fix [restoring joint consensus](https://github.com/etcd-io/etcd/pull/11003).
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- Visit [`Progress` in stable order](https://github.com/etcd-io/etcd/pull/11004).
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+- Proactively [probe newly added followers](https://github.com/etcd-io/etcd/pull/11037).
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+ - The general expectation in `tracker.Progress.Next == c.LastIndex` is that the follower has no log at all (and will thus likely need a snapshot), though the app may have applied a snapshot out of band before adding the replica (thus making the first index the better choice).
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+ - Previously, when the leader applied a new configuration that added voters, it would not immediately probe these voters, delaying when they would be caught up.
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### Package `wal`
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Gyuho Lee