Merge pull request #9287 from gyuho/changelog-3.4

CHANGELOG: updates from January/February 2018

CHANGELOG-3.2.md

@@ -1,5 +1,18 @@
 
 
+## [v3.2.16](https://github.com/coreos/etcd/releases/tag/v3.2.16) (2018-02-12)
+
+See [code changes](https://github.com/coreos/etcd/compare/v3.2.15...v3.2.16) and [v3.2 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_2.md) for any breaking changes.
+
+### Fixed(v3)
+
+- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9297).
+  - "unsynced" watcher is watcher that needs to be in sync with events that have happened.
+  - That is, "unsynced" watcher is the slow watcher that was requested on old revision.
+  - "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
+  - Which possibly causes missing events from "unsynced" watchers.
+
+
 ## [v3.2.15](https://github.com/coreos/etcd/releases/tag/v3.2.15) (2018-01-22)
 
 See [code changes](https://github.com/coreos/etcd/compare/v3.2.14...v3.2.15) and [v3.2 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_2.md) for any breaking changes.

CHANGELOG-3.3.md

@@ -1,5 +1,27 @@
 
 
+## [v3.3.1](https://github.com/coreos/etcd/releases/tag/v3.3.1) (2018-02-12)
+
+See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.3.1) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes.
+
+### Improved
+
+- Add [warnings on requests taking too long](https://github.com/coreos/etcd/pull/9288).
+  - e.g. `etcdserver: read-only range request "key:\"\\000\" range_end:\"\\000\" " took too long [3.389041388s] to execute`
+
+### Fixed(v3)
+
+- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9281).
+  - "unsynced" watcher is watcher that needs to be in sync with events that have happened.
+  - That is, "unsynced" watcher is the slow watcher that was requested on old revision.
+  - "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
+  - Which possibly causes missing events from "unsynced" watchers.
+
+### Security
+
+- Compile with [*Go 1.9.4*](https://groups.google.com/forum/#!topic/golang-announce/lGkem2e5WyQ) (v3.3.0 was compiled with Go *1.9.3*).
+
+
 ## [v3.3.0](https://github.com/coreos/etcd/releases/tag/v3.3.0) (2018-02-01)
 
 See [code changes](https://github.com/coreos/etcd/compare/v3.2.0...v3.3.0) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes.

CHANGELOG-3.4.md

@@ -1,8 +1,17 @@
 
 
-## v3.4.0 (TBD)
+## v3.4.0 (TBD 2018-05-01)
 
-**v3.4.0 is not yet released.**
+See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [v3.4 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_4.md) for any breaking changes.
+
+### Improved
+
+- Add [jitter to watch progress notify](https://github.com/coreos/etcd/pull/9278) to prevent [spikes in `etcd_network_client_grpc_sent_bytes_total`](https://github.com/coreos/etcd/issues/9246).
+- Add [warnings on requests taking too long](https://github.com/coreos/etcd/pull/9288).
+  - e.g. `etcdserver: read-only range request "key:\"\\000\" range_end:\"\\000\" " took too long [3.389041388s] to execute`
+- Improve [long-running concurrent read transactions under light write workloads](https://github.com/coreos/etcd/pull/9296).
+  - Previously, periodic commit on pending writes blocks incoming read transactions, even if there is no pending write.
+  - Now, periodic commit operation does not block concurrent read transactions, thus improves long-running read transaction performance.
 
 ### Changed(Breaking Changes)
 
@@ -24,18 +33,20 @@
   - Now `go get/install/build` on `etcd` packages (e.g. `clientv3`, `tools/benchmark`) enforce builds with etcd `vendor` directory.
 - Reorganize [internal packages](https://github.com/coreos/etcd/issues/9220).
   - `internal/*` packages [cannot be(are not meant to be) imported by external projects](https://docs.google.com/document/d/1e8kOo3r51b2BWtTs_1uADIA5djfXhPT36s6eHVRIvaU/edit).
-  - Move `"github.com/coreos/etcd/alarm"` to [`"github.com/coreos/etcd/internal/alarm"`](https://github.com/coreos/etcd/pull/9234).
-  - Move `"github.com/coreos/etcd/auth"` to [`"github.com/coreos/etcd/internal/auth"`](https://github.com/coreos/etcd/pull/9243).
-  - Move `"github.com/coreos/etcd/compactor"` to [`"github.com/coreos/etcd/internal/compactor"`](https://github.com/coreos/etcd/pull/9234).
-    - [`embed.CompactorModePeriodic`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModePeriodic`.
-    - [`embed.CompactorModeRevision`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModeRevision`.
-  - Move `"github.com/coreos/etcd/discovery"` to [`"github.com/coreos/etcd/internal/discovery"`](https://github.com/coreos/etcd/pull/9233).
-  - Move `"github.com/coreos/etcd/lease"` to [`"github.com/coreos/etcd/internal/lease"`](https://github.com/coreos/etcd/pull/9238).
-  - Move `"github.com/coreos/etcd/mvcc"` to [`"github.com/coreos/etcd/internal/mvcc"`](https://github.com/coreos/etcd/pull/9238).
-  - Move `"github.com/coreos/etcd/snap"` to [`"github.com/coreos/etcd/internal/raftsnap"`](https://github.com/coreos/etcd/pull/9211).
-  - Move `"github.com/coreos/etcd/store"` to [`"github.com/coreos/etcd/internal/store"`](https://github.com/coreos/etcd/pull/9238).
-  - Move `"github.com/coreos/etcd/version"` to [`"github.com/coreos/etcd/internal/version"`](https://github.com/coreos/etcd/pull/9244).
-- Move `"github.com/coreos/etcd/etcdserver/auth"` to [`"github.com/coreos/etcd/etcdserver/v2auth"`](https://github.com/coreos/etcd/pull/9275).
+    - Move `"github.com/coreos/etcd/alarm"` to [`"github.com/coreos/etcd/internal/alarm"`](https://github.com/coreos/etcd/pull/9234).
+    - Move `"github.com/coreos/etcd/auth"` to [`"github.com/coreos/etcd/internal/auth"`](https://github.com/coreos/etcd/pull/9243).
+    - Move `"github.com/coreos/etcd/compactor"` to [`"github.com/coreos/etcd/internal/compactor"`](https://github.com/coreos/etcd/pull/9234).
+      - [`embed.CompactorModePeriodic`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModePeriodic`.
+      - [`embed.CompactorModeRevision`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModeRevision`.
+    - Move `"github.com/coreos/etcd/discovery"` to [`"github.com/coreos/etcd/internal/discovery"`](https://github.com/coreos/etcd/pull/9233).
+    - Move `"github.com/coreos/etcd/lease"` to [`"github.com/coreos/etcd/internal/lease"`](https://github.com/coreos/etcd/pull/9238).
+    - Move `"github.com/coreos/etcd/mvcc"` to [`"github.com/coreos/etcd/internal/mvcc"`](https://github.com/coreos/etcd/pull/9238).
+    - Move `"github.com/coreos/etcd/snap"` to [`"github.com/coreos/etcd/internal/raftsnap"`](https://github.com/coreos/etcd/pull/9211).
+    - Move `"github.com/coreos/etcd/store"` to [`"github.com/coreos/etcd/internal/store"`](https://github.com/coreos/etcd/pull/9238).
+    - Move `"github.com/coreos/etcd/version"` to [`"github.com/coreos/etcd/internal/version"`](https://github.com/coreos/etcd/pull/9244).
+  - Move `"github.com/coreos/etcd/etcdserver/auth"` to [`"github.com/coreos/etcd/etcdserver/v2auth"`](https://github.com/coreos/etcd/pull/9275).
+  - Change v3 `etcdctl snapshot` exit codes with [`snapshot` package](https://github.com/coreos/etcd/pull/9118/commits/df689f4280e1cce4b9d61300be13ca604d41670a).
+    - Exit on error with exit code 1 (no more exit code 5 or 6 on `snapshot save/restore` commands).
 
 ### Added(`etcd`)
 
@@ -53,20 +64,31 @@
 - Add [`errors` field to `etcdserverpb.StatusResponse`](https://github.com/coreos/etcd/pull/9206) for server-side error.
   - e.g. `"etcdserver: no leader", "NOSPACE", "CORRUPT"`
 - Add [`dbSizeInUse` field to `etcdserverpb.StatusResponse`](https://github.com/coreos/etcd/pull/9256) for actual DB size after compaction.
-  - Also exposed as metric `etcd_debugging_mvcc_db_total_size_in_use_in_bytes`
 
 ### Added(v3 `etcdctl`)
 
 - Add [`check datascale`](https://github.com/coreos/etcd/pull/9185) command.
-- Add ["raft applied index" to `endpoint status`](https://github.com/coreos/etcd/pull/9176).
-- Add ["errors" to `endpoint status`](https://github.com/coreos/etcd/pull/9206).
+- Add ["raft applied index" field to `endpoint status`](https://github.com/coreos/etcd/pull/9176).
+- Add ["errors" field to `endpoint status`](https://github.com/coreos/etcd/pull/9206).
+
+### Added(metrics)
+
+- Add [`etcd_debugging_mvcc_db_total_size_in_use_in_bytes`](https://github.com/coreos/etcd/pull/9256) Prometheus metric.
 
 ### Package `raft`
 
-- Improve [Raft `becomeLeader` and `stepLeader`](https://github.com/coreos/etcd/pull/9073) by keeping track of latest `pb.EntryConfChange` index.
-  - Previously record `pendingConf` boolean field scanning the entire tail of the log, which can delay hearbeat send.
+- Fix [deadlock during PreVote migration process](https://github.com/coreos/etcd/pull/8525).
 - Add [`raft.ErrProposalDropped`](https://github.com/coreos/etcd/pull/9067).
   - Now `(r *raft) Step` returns `raft.ErrProposalDropped` if a proposal has been ignored.
   - e.g. a node is removed from cluster, [ongoing leadership transfer](https://github.com/coreos/etcd/issues/8975), etc.
+- Improve [Raft `becomeLeader` and `stepLeader`](https://github.com/coreos/etcd/pull/9073) by keeping track of latest `pb.EntryConfChange` index.
+  - Previously record `pendingConf` boolean field scanning the entire tail of the log, which can delay hearbeat send.
 - Fix [missing learner nodes on `(n *node) ApplyConfChange`](https://github.com/coreos/etcd/pull/9116).
 
+### Fixed(v3)
+
+- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9281).
+  - "unsynced" watcher is watcher that needs to be in sync with events that have happened.
+  - That is, "unsynced" watcher is the slow watcher that was requested on old revision.
+  - "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
+  - Which possibly causes missing events from "unsynced" watchers.