fix: failed to start timer due to controller isn't ready

internal/controller/eventbus/controller.go

@@ -63,6 +63,7 @@ func NewController(cfg Config, member embedetcd.Member) *controller {
 		eventBusMap: map[string]*metadata.Eventbus{},
 		member:      member,
 		isLeader:    false,
+		isReady:     false,
 		readyNotify: make(chan error, 1),
 		stopNotify:  make(chan error, 1),
 	}
@@ -83,6 +84,7 @@ type controller struct {
 	cancelFunc      context.CancelFunc
 	membershipMutex sync.Mutex
 	isLeader        bool
+	isReady         bool
 	readyNotify     chan error
 	stopNotify      chan error
 	mutex           sync.Mutex
@@ -457,6 +459,12 @@ func (ctrl *controller) Ping(_ context.Context, _ *emptypb.Empty) (*ctrlpb.PingR
 	}, nil
 }
 
+func (ctrl *controller) IsReady(_ context.Context, _ *emptypb.Empty) (*ctrlpb.IsReadyResponse, error) {
+	return &ctrlpb.IsReadyResponse{
+		IsReady: ctrl.isReady,
+	}, nil
+}
+
 func (ctrl *controller) ReportSegmentLeader(ctx context.Context,
 	req *ctrlpb.ReportSegmentLeaderRequest) (*emptypb.Empty, error) {
 	err := ctrl.eventLogMgr.UpdateSegmentReplicas(ctx, vanus.NewIDFromUint64(req.LeaderId), req.Term)
@@ -495,6 +503,7 @@ func (ctrl *controller) membershipChangedProcessor(ctx context.Context, event em
 			ctrl.stop(ctx, err)
 			return err
 		}
+		ctrl.isReady = true
 	case embedetcd.EventBecomeFollower:
 		if !ctrl.isLeader {
 			return nil

internal/controller/eventbus/eventlog/eventlog.go

@@ -24,6 +24,7 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/huandu/skiplist"
+	ctrlerrors "github.com/linkall-labs/vanus/internal/controller/errors"
 	"github.com/linkall-labs/vanus/internal/controller/eventbus/block"
 	"github.com/linkall-labs/vanus/internal/controller/eventbus/errors"
 	"github.com/linkall-labs/vanus/internal/controller/eventbus/metadata"
@@ -174,6 +175,9 @@ func (mgr *eventlogManager) AcquireEventLog(ctx context.Context, eventbusID vanu
 		})
 		return nil, err
 	}
+	if mgr.kvClient == nil {
+		return nil, ctrlerrors.ErrNotLeader
+	}
 	elMD := &metadata.Eventlog{
 		ID:         id,
 		EventbusID: eventbusID,

internal/timer/timingwheel/timingwheel.go

@@ -35,6 +35,7 @@ import (
 	"github.com/linkall-labs/vanus/pkg/controller"
 	ctrlpb "github.com/linkall-labs/vanus/proto/pkg/controller"
 	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/protobuf/types/known/emptypb"
 	"k8s.io/apimachinery/pkg/util/wait"
 )
 
@@ -154,8 +155,25 @@ func (tw *timingWheel) Start(ctx context.Context) error {
 		"leader": tw.leader,
 	})
 
-	// here is to wait for the leader to complete the creation of all eventbus
+	// here is to wait for controller is ready
 	waitCtx, cancel := context.WithCancel(ctx)
+	wait.Until(func() {
+		resp, err := tw.ctrlCli.IsReady(ctx, &emptypb.Empty{})
+		if err != nil {
+			log.Error(ctx, "get eventbus controller state failed", map[string]interface{}{
+				log.KeyError: err,
+			})
+			return
+		}
+		if resp.IsReady {
+			cancel()
+		} else {
+			log.Info(ctx, "wait for the controller to be ready", nil)
+		}
+	}, time.Second, waitCtx.Done())
+
+	// here is to wait for the leader to complete the creation of all eventbus
+	waitCtx, cancel = context.WithCancel(ctx)
 	wait.Until(func() {
 		if tw.IsLeader() || tw.IsDeployed(ctx) {
 			cancel()

pkg/controller/eventbus.go

@@ -43,6 +43,15 @@ func (ec *eventbusClient) Close() error {
 	return ec.cc.close()
 }
 
+func (ec *eventbusClient) IsReady(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*ctrlpb.IsReadyResponse, error) {
+	out := new(ctrlpb.IsReadyResponse)
+	err := ec.cc.invoke(ctx, "/linkall.vanus.controller.EventBusController/IsReady", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (ec *eventbusClient) CreateEventBus(ctx context.Context, in *ctrlpb.CreateEventBusRequest, opts ...grpc.CallOption) (*metapb.EventBus, error) {
 	out := new(metapb.EventBus)
 	err := ec.cc.invoke(ctx, "/linkall.vanus.controller.EventBusController/CreateEventBus", in, out, opts...)