Edge sync functionality - added cluster support

application/src/main/java/org/thingsboard/server/actors/app/AppActor.java

@@ -36,7 +36,6 @@ import org.thingsboard.server.common.data.plugin.ComponentLifecycleEvent;
 import org.thingsboard.server.common.msg.MsgType;
 import org.thingsboard.server.common.msg.TbActorMsg;
 import org.thingsboard.server.common.msg.aware.TenantAwareMsg;
-import org.thingsboard.server.common.msg.edge.EdgeEventUpdateMsg;
 import org.thingsboard.server.common.msg.plugin.ComponentLifecycleMsg;
 import org.thingsboard.server.common.msg.queue.QueueToRuleEngineMsg;
 import org.thingsboard.server.common.msg.queue.RuleEngineException;
@@ -105,7 +104,9 @@ public class AppActor extends ContextAwareActor {
                 onToDeviceActorMsg((TenantAwareMsg) msg, true);
                 break;
             case EDGE_EVENT_UPDATE_TO_EDGE_SESSION_MSG:
-                onToTenantActorMsg((EdgeEventUpdateMsg) msg);
+            case EDGE_SYNC_REQUEST_TO_EDGE_SESSION_MSG:
+            case EDGE_SYNC_RESPONSE_FROM_EDGE_SESSION_MSG:
+                onToTenantActorMsg((TenantAwareMsg) msg);
                 break;
             case SESSION_TIMEOUT_MSG:
                 ctx.broadcastToChildrenByType(msg, EntityType.TENANT);
@@ -193,7 +194,7 @@ public class AppActor extends ContextAwareActor {
                 () -> new TenantActor.ActorCreator(systemContext, tenantId));
     }
 
-    private void onToTenantActorMsg(EdgeEventUpdateMsg msg) {
+    private void onToTenantActorMsg(TenantAwareMsg msg) {
         TbActorRef target = null;
         if (ModelConstants.SYSTEM_TENANT.equals(msg.getTenantId())) {
             log.warn("Message has system tenant id: {}", msg);

application/src/main/java/org/thingsboard/server/actors/tenant/TenantActor.java

@@ -48,6 +48,8 @@ import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.aware.DeviceAwareMsg;
 import org.thingsboard.server.common.msg.aware.RuleChainAwareMsg;
 import org.thingsboard.server.common.msg.edge.EdgeEventUpdateMsg;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
 import org.thingsboard.server.common.msg.plugin.ComponentLifecycleMsg;
 import org.thingsboard.server.common.msg.queue.PartitionChangeMsg;
 import org.thingsboard.server.common.msg.queue.QueueToRuleEngineMsg;
@@ -167,7 +169,9 @@ public class TenantActor extends RuleChainManagerActor {
                 onRuleChainMsg((RuleChainAwareMsg) msg);
                 break;
             case EDGE_EVENT_UPDATE_TO_EDGE_SESSION_MSG:
-                onToEdgeSessionMsg((EdgeEventUpdateMsg) msg);
+            case EDGE_SYNC_REQUEST_TO_EDGE_SESSION_MSG:
+            case EDGE_SYNC_RESPONSE_FROM_EDGE_SESSION_MSG:
+                onToEdgeSessionMsg(msg);
                 break;
             default:
                 return false;
@@ -271,9 +275,24 @@ public class TenantActor extends RuleChainManagerActor {
                 () -> new DeviceActorCreator(systemContext, tenantId, deviceId));
     }
 
-    private void onToEdgeSessionMsg(EdgeEventUpdateMsg msg) {
-        log.trace("[{}] onToEdgeSessionMsg [{}]", msg.getTenantId(), msg);
-        systemContext.getEdgeRpcService().onEdgeEvent(tenantId, msg.getEdgeId());
+    private void onToEdgeSessionMsg(TbActorMsg msg) {
+        switch (msg.getMsgType()) {
+            case EDGE_EVENT_UPDATE_TO_EDGE_SESSION_MSG:
+                EdgeEventUpdateMsg edgeEventUpdateMsg = (EdgeEventUpdateMsg) msg;
+                log.trace("[{}] onToEdgeSessionMsg [{}]", edgeEventUpdateMsg.getTenantId(), msg);
+                systemContext.getEdgeRpcService().onEdgeEvent(tenantId, edgeEventUpdateMsg.getEdgeId());
+                break;
+            case EDGE_SYNC_REQUEST_TO_EDGE_SESSION_MSG:
+                ToEdgeSyncRequest toEdgeSyncRequest = (ToEdgeSyncRequest) msg;
+                log.trace("[{}] toEdgeSyncRequest [{}]", toEdgeSyncRequest.getTenantId(), msg);
+                systemContext.getEdgeRpcService().startSyncProcess(tenantId, toEdgeSyncRequest.getEdgeId(), toEdgeSyncRequest.getId());
+                break;
+            case EDGE_SYNC_RESPONSE_FROM_EDGE_SESSION_MSG:
+                FromEdgeSyncResponse fromEdgeSyncResponse = (FromEdgeSyncResponse) msg;
+                log.trace("[{}] fromEdgeSyncResponse [{}]", fromEdgeSyncResponse.getTenantId(), msg);
+                systemContext.getEdgeRpcService().processSyncResponse(fromEdgeSyncResponse);
+                break;
+        }
     }
 
     private ApiUsageState getApiUsageState() {

application/src/main/java/org/thingsboard/server/controller/BaseController.java

@@ -269,10 +269,7 @@ public abstract class BaseController {
     protected EdgeService edgeService;
 
     @Autowired(required = false)
-    protected EdgeNotificationService edgeNotificationService;
-
-    @Autowired(required = false)
-    protected EdgeRpcService edgeGrpcService;
+    protected EdgeRpcService edgeRpcService;
 
     @Autowired
     protected TbNotificationEntityService notificationEntityService;

application/src/main/java/org/thingsboard/server/controller/EdgeController.java

@@ -22,6 +22,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -32,6 +33,7 @@ import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.async.DeferredResult;
 import org.thingsboard.rule.engine.flow.TbRuleChainInputNode;
 import org.thingsboard.server.common.data.Customer;
 import org.thingsboard.server.common.data.EntitySubtype;
@@ -47,6 +49,8 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.rule.RuleChain;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
 import org.thingsboard.server.dao.exception.DataValidationException;
 import org.thingsboard.server.dao.exception.IncorrectParameterException;
 import org.thingsboard.server.dao.model.ModelConstants;
@@ -61,6 +65,7 @@ import org.thingsboard.server.service.security.permission.Resource;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.UUID;
 import java.util.stream.Collectors;
 
 import static org.thingsboard.server.controller.ControllerConstants.CUSTOMER_ID_PARAM_DESCRIPTION;
@@ -529,24 +534,35 @@ public class EdgeController extends BaseController {
                     "All entities that are assigned to particular edge are going to be send to remote edge service." + TENANT_AUTHORITY_PARAGRAPH)
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")
     @RequestMapping(value = "/edge/sync/{edgeId}", method = RequestMethod.POST)
-    public void syncEdge(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
+    public DeferredResult<ResponseEntity> syncEdge(@ApiParam(value = EDGE_ID_PARAM_DESCRIPTION, required = true)
                          @PathVariable("edgeId") String strEdgeId) throws ThingsboardException {
         checkParameter("edgeId", strEdgeId);
         try {
+            final DeferredResult<ResponseEntity> response = new DeferredResult<>();
             if (isEdgesEnabled()) {
                 EdgeId edgeId = new EdgeId(toUUID(strEdgeId));
                 edgeId = checkNotNull(edgeId);
                 SecurityUser user = getCurrentUser();
                 TenantId tenantId = user.getTenantId();
-                edgeGrpcService.startSyncProcess(tenantId, edgeId);
+                ToEdgeSyncRequest request = new ToEdgeSyncRequest(UUID.randomUUID(), tenantId, edgeId);
+                edgeRpcService.processSyncRequest(request, fromEdgeSyncResponse -> reply(response, fromEdgeSyncResponse));
             } else {
                 throw new ThingsboardException("Edges support disabled", ThingsboardErrorCode.GENERAL);
             }
+            return response;
         } catch (Exception e) {
             throw handleException(e);
         }
     }
 
+    private void reply(DeferredResult<ResponseEntity> response, FromEdgeSyncResponse fromEdgeSyncResponse) {
+        if (fromEdgeSyncResponse.isSuccess()) {
+            response.setResult(new ResponseEntity<>(HttpStatus.OK));
+        } else {
+            response.setErrorResult(new ThingsboardException("Edge is not connected", ThingsboardErrorCode.GENERAL));
+        }
+    }
+
     @ApiOperation(value = "Find missing rule chains (findMissingToRelatedRuleChains)",
             notes = "Returns list of rule chains ids that are not assigned to particular edge, but these rule chains are present in the already assigned rule chains to edge." + TENANT_AUTHORITY_PARAGRAPH)
     @PreAuthorize("hasAuthority('TENANT_ADMIN')")

application/src/main/java/org/thingsboard/server/service/edge/rpc/EdgeGrpcService.java

@@ -26,6 +26,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Service;
 import org.thingsboard.common.util.ThingsBoardThreadFactory;
+import org.thingsboard.server.cluster.TbClusterService;
 import org.thingsboard.server.common.data.DataConstants;
 import org.thingsboard.server.common.data.ResourceUtils;
 import org.thingsboard.server.common.data.edge.Edge;
@@ -34,6 +35,8 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.kv.BasicTsKvEntry;
 import org.thingsboard.server.common.data.kv.BooleanDataEntry;
 import org.thingsboard.server.common.data.kv.LongDataEntry;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
 import org.thingsboard.server.gen.edge.v1.EdgeRpcServiceGrpc;
 import org.thingsboard.server.gen.edge.v1.RequestMsg;
 import org.thingsboard.server.gen.edge.v1.ResponseMsg;
@@ -59,6 +62,7 @@ import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
+import java.util.function.Consumer;
 
 @Service
 @Slf4j
@@ -71,6 +75,8 @@ public class EdgeGrpcService extends EdgeRpcServiceGrpc.EdgeRpcServiceImplBase i
     private final Map<EdgeId, Boolean> sessionNewEvents = new HashMap<>();
     private final ConcurrentMap<EdgeId, ScheduledFuture<?>> sessionEdgeEventChecks = new ConcurrentHashMap<>();
 
+    private final ConcurrentMap<UUID, Consumer<FromEdgeSyncResponse>> localSyncEdgeRequests = new ConcurrentHashMap<>();
+
     @Value("${edges.rpc.port}")
     private int rpcPort;
     @Value("${edges.rpc.ssl.enabled}")
@@ -98,12 +104,17 @@ public class EdgeGrpcService extends EdgeRpcServiceGrpc.EdgeRpcServiceImplBase i
     @Autowired
     private TelemetrySubscriptionService tsSubService;
 
+    @Autowired
+    private TbClusterService clusterService;
+
     private Server server;
 
     private ScheduledExecutorService edgeEventProcessingExecutorService;
 
     private ScheduledExecutorService sendDownlinkExecutorService;
 
+    private ScheduledExecutorService syncScheduler;
+
     @PostConstruct
     public void init() {
         log.info("Initializing Edge RPC service!");
@@ -131,6 +142,7 @@ public class EdgeGrpcService extends EdgeRpcServiceGrpc.EdgeRpcServiceImplBase i
         }
         this.edgeEventProcessingExecutorService = Executors.newScheduledThreadPool(schedulerPoolSize, ThingsBoardThreadFactory.forName("edge-scheduler"));
         this.sendDownlinkExecutorService = Executors.newScheduledThreadPool(sendSchedulerPoolSize, ThingsBoardThreadFactory.forName("edge-send-scheduler"));
+        this.syncScheduler = Executors.newSingleThreadScheduledExecutor(ThingsBoardThreadFactory.forName("edge-sync-scheduler"));
         log.info("Edge RPC service initialized!");
     }
 
@@ -191,16 +203,19 @@ public class EdgeGrpcService extends EdgeRpcServiceGrpc.EdgeRpcServiceImplBase i
 
     @Override
     public void onEdgeEvent(TenantId tenantId, EdgeId edgeId) {
-        log.trace("[{}] onEdgeEvent [{}]", tenantId, edgeId.getId());
-        final Lock newEventLock = sessionNewEventsLocks.computeIfAbsent(edgeId, id -> new ReentrantLock());
-        newEventLock.lock();
-        try {
-            if (Boolean.FALSE.equals(sessionNewEvents.get(edgeId))) {
-                log.trace("[{}] set session new events flag to true [{}]", tenantId, edgeId.getId());
-                sessionNewEvents.put(edgeId, true);
+        EdgeGrpcSession session = sessions.get(edgeId);
+        if (session != null && session.isConnected()) {
+            log.trace("[{}] onEdgeEvent [{}]", tenantId, edgeId.getId());
+            final Lock newEventLock = sessionNewEventsLocks.computeIfAbsent(edgeId, id -> new ReentrantLock());
+            newEventLock.lock();
+            try {
+                if (Boolean.FALSE.equals(sessionNewEvents.get(edgeId))) {
+                    log.trace("[{}] set session new events flag to true [{}]", tenantId, edgeId.getId());
+                    sessionNewEvents.put(edgeId, true);
+                }
+            } finally {
+                newEventLock.unlock();
             }
-        } finally {
-            newEventLock.unlock();
         }
     }
 
@@ -221,13 +236,48 @@ public class EdgeGrpcService extends EdgeRpcServiceGrpc.EdgeRpcServiceImplBase i
     }
 
     @Override
-    public void startSyncProcess(TenantId tenantId, EdgeId edgeId) {
+    public void startSyncProcess(TenantId tenantId, EdgeId edgeId, UUID requestId) {
         EdgeGrpcSession session = sessions.get(edgeId);
-        if (session != null && session.isConnected()) {
-            session.startSyncProcess(tenantId, edgeId);
+        if (session != null) {
+            boolean success = false;
+            if (session.isConnected()) {
+                session.startSyncProcess(tenantId, edgeId);
+                success = true;
+            }
+            clusterService.pushEdgeSyncResponseToCore(new FromEdgeSyncResponse(requestId, tenantId, edgeId, success));
+        }
+    }
+
+    @Override
+    public void processSyncRequest(ToEdgeSyncRequest request, Consumer<FromEdgeSyncResponse> responseConsumer) {
+        log.trace("[{}][{}] Processing sync edge request [{}]", request.getTenantId(), request.getId(), request.getEdgeId());
+        UUID requestId = request.getId();
+        localSyncEdgeRequests.put(requestId, responseConsumer);
+        clusterService.pushEdgeSyncRequestToCore(request);
+        scheduleSyncRequestTimeout(request, requestId);
+    }
+
+    private void scheduleSyncRequestTimeout(ToEdgeSyncRequest request, UUID requestId) {
+        log.trace("[{}] scheduling sync edge request", requestId);
+        syncScheduler.schedule(() -> {
+            log.trace("[{}] checking if sync edge request is not processed...", requestId);
+            Consumer<FromEdgeSyncResponse> consumer = localSyncEdgeRequests.remove(requestId);
+            if (consumer != null) {
+                log.trace("[{}] timeout for processing sync edge request.", requestId);
+                consumer.accept(new FromEdgeSyncResponse(requestId, request.getTenantId(), request.getEdgeId(), false));
+            }
+        }, 10, TimeUnit.SECONDS);
+    }
+
+    @Override
+    public void processSyncResponse(FromEdgeSyncResponse response) {
+        log.trace("[{}] Received response from sync service: [{}]", response.getId(), response);
+        UUID requestId = response.getId();
+        Consumer<FromEdgeSyncResponse> consumer = localSyncEdgeRequests.remove(requestId);
+        if (consumer != null) {
+            consumer.accept(response);
         } else {
-            log.error("[{}] Edge is not connected [{}]", tenantId, edgeId);
-            throw new RuntimeException("Edge is not connected");
+            log.trace("[{}] Unknown or stale sync response received [{}]", requestId, response);
         }
     }
 

application/src/main/java/org/thingsboard/server/service/edge/rpc/EdgeRpcService.java

@@ -18,6 +18,11 @@ package org.thingsboard.server.service.edge.rpc;
 import org.thingsboard.server.common.data.edge.Edge;
 import org.thingsboard.server.common.data.id.EdgeId;
 import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
+
+import java.util.UUID;
+import java.util.function.Consumer;
 
 public interface EdgeRpcService {
 
@@ -27,5 +32,9 @@ public interface EdgeRpcService {
 
     void onEdgeEvent(TenantId tenantId, EdgeId edgeId);
 
-    void startSyncProcess(TenantId tenantId, EdgeId edgeId);
+    void startSyncProcess(TenantId tenantId, EdgeId edgeId, UUID requestId);
+
+    void processSyncRequest(ToEdgeSyncRequest request, Consumer<FromEdgeSyncResponse> responseConsumer);
+
+    void processSyncResponse(FromEdgeSyncResponse response);
 }

application/src/main/java/org/thingsboard/server/service/queue/DefaultTbClusterService.java

@@ -49,6 +49,8 @@ import org.thingsboard.server.common.data.queue.Queue;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.ToDeviceActorNotificationMsg;
 import org.thingsboard.server.common.msg.edge.EdgeEventUpdateMsg;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
 import org.thingsboard.server.common.msg.plugin.ComponentLifecycleMsg;
 import org.thingsboard.server.common.msg.queue.ServiceType;
 import org.thingsboard.server.common.msg.queue.TopicPartitionInfo;
@@ -351,12 +353,32 @@ public class DefaultTbClusterService implements TbClusterService {
         log.trace("[{}] Processing edge {} event update ", tenantId, edgeId);
         EdgeEventUpdateMsg msg = new EdgeEventUpdateMsg(tenantId, edgeId);
         byte[] msgBytes = encodingService.encode(msg);
+        ToCoreNotificationMsg toCoreMsg = ToCoreNotificationMsg.newBuilder().setEdgeEventUpdateMsg(ByteString.copyFrom(msgBytes)).build();
+        pushEdgeSyncMsgToCore(edgeId, toCoreMsg);
+    }
+
+    @Override
+    public void pushEdgeSyncRequestToCore(ToEdgeSyncRequest toEdgeSyncRequest) {
+        log.trace("[{}] Processing edge sync request {} ", toEdgeSyncRequest.getTenantId(), toEdgeSyncRequest);
+        byte[] msgBytes = encodingService.encode(toEdgeSyncRequest);
+        ToCoreNotificationMsg toCoreMsg = ToCoreNotificationMsg.newBuilder().setToEdgeSyncRequestMsg(ByteString.copyFrom(msgBytes)).build();
+        pushEdgeSyncMsgToCore(toEdgeSyncRequest.getEdgeId(), toCoreMsg);
+    }
+
+    @Override
+    public void pushEdgeSyncResponseToCore(FromEdgeSyncResponse fromEdgeSyncResponse) {
+        log.trace("[{}] Processing edge sync response {}", fromEdgeSyncResponse.getTenantId(), fromEdgeSyncResponse);
+        byte[] msgBytes = encodingService.encode(fromEdgeSyncResponse);
+        ToCoreNotificationMsg toCoreMsg = ToCoreNotificationMsg.newBuilder().setFromEdgeSyncResponseMsg(ByteString.copyFrom(msgBytes)).build();
+        pushEdgeSyncMsgToCore(fromEdgeSyncResponse.getEdgeId(), toCoreMsg);
+    }
+
+    private void pushEdgeSyncMsgToCore(EdgeId edgeId, ToCoreNotificationMsg toCoreMsg) {
         TbQueueProducer<TbProtoQueueMsg<ToCoreNotificationMsg>> toCoreNfProducer = producerProvider.getTbCoreNotificationsMsgProducer();
         Set<String> tbCoreServices = partitionService.getAllServiceIds(ServiceType.TB_CORE);
         for (String serviceId : tbCoreServices) {
             TopicPartitionInfo tpi = notificationsTopicService.getNotificationsTopic(ServiceType.TB_CORE, serviceId);
-            ToCoreNotificationMsg toCoreMsg = ToCoreNotificationMsg.newBuilder().setEdgeEventUpdateMsg(ByteString.copyFrom(msgBytes)).build();
-            toCoreNfProducer.send(tpi, new TbProtoQueueMsg<>(msg.getEdgeId().getId(), toCoreMsg), null);
+            toCoreNfProducer.send(tpi, new TbProtoQueueMsg<>(edgeId.getId(), toCoreMsg), null);
             toCoreNfs.incrementAndGet();
         }
     }

application/src/main/java/org/thingsboard/server/service/queue/DefaultTbCoreConsumerService.java

@@ -20,8 +20,6 @@ import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
-import org.springframework.context.event.EventListener;
-import org.springframework.core.annotation.Order;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import org.thingsboard.common.util.JacksonUtil;
@@ -76,7 +74,6 @@ import org.thingsboard.server.service.state.DeviceStateService;
 import org.thingsboard.server.service.subscription.SubscriptionManagerService;
 import org.thingsboard.server.service.subscription.TbLocalSubscriptionService;
 import org.thingsboard.server.service.subscription.TbSubscriptionUtils;
-import org.thingsboard.server.service.sync.vc.EntitiesVersionControlService;
 import org.thingsboard.server.service.sync.vc.GitVersionControlQueueService;
 import org.thingsboard.server.service.transport.msg.TransportToDeviceActorMsgWrapper;
 
@@ -317,13 +314,12 @@ public class DefaultTbCoreConsumerService extends AbstractConsumerService<ToCore
         } else if (toCoreNotification.getComponentLifecycleMsg() != null && !toCoreNotification.getComponentLifecycleMsg().isEmpty()) {
             handleComponentLifecycleMsg(id, toCoreNotification.getComponentLifecycleMsg());
             callback.onSuccess();
-        } else if (toCoreNotification.getEdgeEventUpdateMsg() != null && !toCoreNotification.getEdgeEventUpdateMsg().isEmpty()) {
-            Optional<TbActorMsg> actorMsg = encodingService.decode(toCoreNotification.getEdgeEventUpdateMsg().toByteArray());
-            if (actorMsg.isPresent()) {
-                log.trace("[{}] Forwarding message to App Actor {}", id, actorMsg.get());
-                actorContext.tellWithHighPriority(actorMsg.get());
-            }
-            callback.onSuccess();
+        } else if (!toCoreNotification.getEdgeEventUpdateMsg().isEmpty()) {
+            forwardToAppActor(id, encodingService.decode(toCoreNotification.getEdgeEventUpdateMsg().toByteArray()), callback);
+        } else if (!toCoreNotification.getToEdgeSyncRequestMsg().isEmpty()) {
+            forwardToAppActor(id, encodingService.decode(toCoreNotification.getToEdgeSyncRequestMsg().toByteArray()), callback);
+        } else if (!toCoreNotification.getFromEdgeSyncResponseMsg().isEmpty()) {
+            forwardToAppActor(id, encodingService.decode(toCoreNotification.getFromEdgeSyncResponseMsg().toByteArray()), callback);
         } else if (toCoreNotification.hasQueueUpdateMsg()) {
             TransportProtos.QueueUpdateMsg queue = toCoreNotification.getQueueUpdateMsg();
             partitionService.updateQueue(queue);
@@ -552,6 +548,14 @@ public class DefaultTbCoreConsumerService extends AbstractConsumerService<ToCore
         actorContext.tell(new TransportToDeviceActorMsgWrapper(toDeviceActorMsg, callback));
     }
 
+    private void forwardToAppActor(UUID id, Optional<TbActorMsg> actorMsg, TbCallback callback) {
+        if (actorMsg.isPresent()) {
+            log.trace("[{}] Forwarding message to App Actor {}", id, actorMsg.get());
+            actorContext.tellWithHighPriority(actorMsg.get());
+        }
+        callback.onSuccess();
+    }
+
     private void throwNotHandled(Object msg, TbCallback callback) {
         log.warn("Message not handled: {}", msg);
         callback.onFailure(new RuntimeException("Message not handled!"));

common/cluster-api/src/main/java/org/thingsboard/server/cluster/TbClusterService.java

@@ -29,6 +29,8 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.plugin.ComponentLifecycleEvent;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.ToDeviceActorNotificationMsg;
+import org.thingsboard.server.common.msg.edge.FromEdgeSyncResponse;
+import org.thingsboard.server.common.msg.edge.ToEdgeSyncRequest;
 import org.thingsboard.server.common.msg.queue.TopicPartitionInfo;
 import org.thingsboard.server.common.msg.rpc.FromDeviceRpcResponse;
 import org.thingsboard.server.gen.transport.TransportProtos.ToVersionControlServiceMsg;
@@ -88,5 +90,9 @@ public interface TbClusterService extends TbQueueClusterService {
 
     void onEdgeEventUpdate(TenantId tenantId, EdgeId edgeId);
 
+    void pushEdgeSyncRequestToCore(ToEdgeSyncRequest toEdgeSyncRequest);
+
+    void pushEdgeSyncResponseToCore(FromEdgeSyncResponse fromEdgeSyncResponse);
+
     void sendNotificationMsgToEdge(TenantId tenantId, EdgeId edgeId, EntityId entityId, String body, EdgeEventType type, EdgeEventActionType action);
 }

common/cluster-api/src/main/proto/queue.proto

@@ -932,6 +932,8 @@ message ToCoreNotificationMsg {
   QueueUpdateMsg queueUpdateMsg = 5;
   QueueDeleteMsg queueDeleteMsg = 6;
   VersionControlResponseMsg vcResponseMsg = 7;
+  bytes toEdgeSyncRequestMsg = 8;
+  bytes fromEdgeSyncResponseMsg = 9;
 }
 
 /* Messages that are handled by ThingsBoard RuleEngine Service */

common/message/src/main/java/org/thingsboard/server/common/msg/MsgType.java

@@ -122,6 +122,12 @@ public enum MsgType {
     /**
      * Message that is sent on Edge Event to Edge Session
      */
-    EDGE_EVENT_UPDATE_TO_EDGE_SESSION_MSG;
+    EDGE_EVENT_UPDATE_TO_EDGE_SESSION_MSG,
+
+    /**
+     * Messages that are sent to and from edge session to start edge synchronization process
+     */
+    EDGE_SYNC_REQUEST_TO_EDGE_SESSION_MSG,
+    EDGE_SYNC_RESPONSE_FROM_EDGE_SESSION_MSG;
 
 }

common/message/src/main/java/org/thingsboard/server/common/msg/edge/FromEdgeSyncResponse.java

@@ -0,0 +1,41 @@
+/**
+ * Copyright © 2016-2022 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.common.msg.edge;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.thingsboard.server.common.data.id.EdgeId;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.msg.MsgType;
+import org.thingsboard.server.common.msg.aware.TenantAwareMsg;
+import org.thingsboard.server.common.msg.cluster.ToAllNodesMsg;
+
+import java.util.UUID;
+
+@AllArgsConstructor
+@Getter
+public class FromEdgeSyncResponse implements TenantAwareMsg, ToAllNodesMsg {
+
+    private final UUID id;
+    private final TenantId tenantId;
+    private final EdgeId edgeId;
+    private final boolean success;
+
+    @Override
+    public MsgType getMsgType() {
+        return MsgType.EDGE_SYNC_RESPONSE_FROM_EDGE_SESSION_MSG;
+    }
+}

common/message/src/main/java/org/thingsboard/server/common/msg/edge/ToEdgeSyncRequest.java

@@ -0,0 +1,39 @@
+/**
+ * Copyright © 2016-2022 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.common.msg.edge;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.thingsboard.server.common.data.id.EdgeId;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.msg.MsgType;
+import org.thingsboard.server.common.msg.aware.TenantAwareMsg;
+import org.thingsboard.server.common.msg.cluster.ToAllNodesMsg;
+
+import java.util.UUID;
+
+@AllArgsConstructor
+@Getter
+public class ToEdgeSyncRequest implements TenantAwareMsg, ToAllNodesMsg {
+    private final UUID id;
+    private final TenantId tenantId;
+    private final EdgeId edgeId;
+
+    @Override
+    public MsgType getMsgType() {
+        return MsgType.EDGE_SYNC_REQUEST_TO_EDGE_SESSION_MSG;
+    }
+}