This is an automated cherry-pick of pingcap#56362

Signed-off-by: ti-chi-bot <[email protected]>

owner/BUILD.bazel

@@ -35,7 +35,11 @@ go_test(
     ],
     embed = [":owner"],
     flaky = True,
+<<<<<<< HEAD:owner/BUILD.bazel
     shard_count = 6,
+=======
+    shard_count = 9,
+>>>>>>> afdd5c2ecd5 (owner: fix data race on ownerManager.campaignCancel (#56362)):pkg/owner/BUILD.bazel
     deps = [
         "//ddl",
         "//infoschema",

owner/manager.go

@@ -186,7 +186,9 @@ func (m *ownerManager) CampaignOwner(withTTL ...int) error {
 	}
 	m.sessionLease.Store(int64(session.Lease()))
 	m.wg.Add(1)
-	go m.campaignLoop(session)
+	var campaignContext context.Context
+	campaignContext, m.campaignCancel = context.WithCancel(m.ctx)
+	go m.campaignLoop(campaignContext, session)
 	return nil
 }
 
@@ -226,9 +228,7 @@ func (m *ownerManager) CampaignCancel() {
 	m.wg.Wait()
 }
 
-func (m *ownerManager) campaignLoop(etcdSession *concurrency.Session) {
-	var campaignContext context.Context
-	campaignContext, m.campaignCancel = context.WithCancel(m.ctx)
+func (m *ownerManager) campaignLoop(campaignContext context.Context, etcdSession *concurrency.Session) {
 	defer func() {
 		m.campaignCancel()
 		if r := recover(); r != nil {

owner/manager_test.go

@@ -379,3 +379,128 @@ func deleteLeader(cli *clientv3.Client, prefixKey string) error {
 	_, err = cli.Delete(context.Background(), string(resp.Kvs[0].Key))
 	return errors.Trace(err)
 }
+<<<<<<< HEAD:owner/manager_test.go
+=======
+
+func TestImmediatelyCancel(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("integration.NewClusterV3 will create file contains a colon which is not allowed on Windows")
+	}
+	integration.BeforeTestExternal(t)
+
+	tInfo := newTestInfo(t)
+	d := tInfo.ddl
+	defer tInfo.Close(t)
+	ownerManager := d.OwnerManager()
+	for i := 0; i < 10; i++ {
+		err := ownerManager.CampaignOwner()
+		require.NoError(t, err)
+		ownerManager.CampaignCancel()
+	}
+}
+
+func TestAcquireDistributedLock(t *testing.T) {
+	const addrFmt = "http://127.0.0.1:%d"
+	cfg := embed.NewConfig()
+	cfg.Dir = t.TempDir()
+	// rand port in [20000, 60000)
+	randPort := int(rand.Int31n(40000)) + 20000
+	clientAddr := fmt.Sprintf(addrFmt, randPort)
+	lcurl, _ := url.Parse(clientAddr)
+	cfg.ListenClientUrls, cfg.AdvertiseClientUrls = []url.URL{*lcurl}, []url.URL{*lcurl}
+	lpurl, _ := url.Parse(fmt.Sprintf(addrFmt, randPort+1))
+	cfg.ListenPeerUrls, cfg.AdvertisePeerUrls = []url.URL{*lpurl}, []url.URL{*lpurl}
+	cfg.InitialCluster = "default=" + lpurl.String()
+	cfg.Logger = "zap"
+	embedEtcd, err := embed.StartEtcd(cfg)
+	require.NoError(t, err)
+	<-embedEtcd.Server.ReadyNotify()
+	t.Cleanup(func() {
+		embedEtcd.Close()
+	})
+	makeEtcdCli := func(t *testing.T) (cli *clientv3.Client) {
+		cli, err := clientv3.New(clientv3.Config{
+			Endpoints: []string{lcurl.String()},
+		})
+		require.NoError(t, err)
+		t.Cleanup(func() {
+			cli.Close()
+		})
+		return cli
+	}
+	t.Run("acquire distributed lock with same client", func(t *testing.T) {
+		cli := makeEtcdCli(t)
+		getLock := make(chan struct{})
+		ctx := context.Background()
+
+		release1, err := owner.AcquireDistributedLock(ctx, cli, "test-lock", 10)
+		require.NoError(t, err)
+		var wg util.WaitGroupWrapper
+		wg.Run(func() {
+			// Acquire another distributed lock will be blocked.
+			release2, err := owner.AcquireDistributedLock(ctx, cli, "test-lock", 10)
+			require.NoError(t, err)
+			getLock <- struct{}{}
+			release2()
+		})
+		timer := time.NewTimer(300 * time.Millisecond)
+		select {
+		case <-getLock:
+			require.FailNow(t, "acquired same lock unexpectedly")
+		case <-timer.C:
+			release1()
+			<-getLock
+		}
+		wg.Wait()
+
+		release1, err = owner.AcquireDistributedLock(ctx, cli, "test-lock/1", 10)
+		require.NoError(t, err)
+		release2, err := owner.AcquireDistributedLock(ctx, cli, "test-lock/2", 10)
+		require.NoError(t, err)
+		release1()
+		release2()
+	})
+
+	t.Run("acquire distributed lock with different clients", func(t *testing.T) {
+		cli1 := makeEtcdCli(t)
+		cli2 := makeEtcdCli(t)
+
+		getLock := make(chan struct{})
+		ctx := context.Background()
+
+		release1, err := owner.AcquireDistributedLock(ctx, cli1, "test-lock", 10)
+		require.NoError(t, err)
+		var wg util.WaitGroupWrapper
+		wg.Run(func() {
+			// Acquire another distributed lock will be blocked.
+			release2, err := owner.AcquireDistributedLock(ctx, cli2, "test-lock", 10)
+			require.NoError(t, err)
+			getLock <- struct{}{}
+			release2()
+		})
+		timer := time.NewTimer(300 * time.Millisecond)
+		select {
+		case <-getLock:
+			require.FailNow(t, "acquired same lock unexpectedly")
+		case <-timer.C:
+			release1()
+			<-getLock
+		}
+		wg.Wait()
+	})
+
+	t.Run("acquire distributed lock until timeout", func(t *testing.T) {
+		cli1 := makeEtcdCli(t)
+		cli2 := makeEtcdCli(t)
+		ctx := context.Background()
+
+		_, err := owner.AcquireDistributedLock(ctx, cli1, "test-lock", 1)
+		require.NoError(t, err)
+		cli1.Close() // Note that release() is not invoked.
+
+		release2, err := owner.AcquireDistributedLock(ctx, cli2, "test-lock", 10)
+		require.NoError(t, err)
+		release2()
+	})
+}
+>>>>>>> afdd5c2ecd5 (owner: fix data race on ownerManager.campaignCancel (#56362)):pkg/owner/manager_test.go