OTA Info store and client lookup

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/attributes/DefaultLwM2MAttributesService.java

@@ -181,6 +181,7 @@ public class DefaultLwM2MAttributesService implements LwM2MAttributesService {
                 }
             }
         });
+        clientContext.update(lwM2MClient);
         // #2.1
         lwM2MClient.getSharedAttributes().forEach((pathIdVer, tsKvProto) -> {
             this.pushUpdateToClientIfNeeded(lwM2MClient, this.getResourceValueFormatKv(lwM2MClient, pathIdVer),

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mClient.java

@@ -142,6 +142,16 @@ public class LwM2mClient implements Serializable {
         builder.setDeviceType(deviceProfile.getName());
     }
 
+    public void refreshSessionId(String nodeId) {
+        UUID newId = UUID.randomUUID();
+        SessionInfoProto.Builder builder = SessionInfoProto.newBuilder().mergeFrom(session);
+        builder.setNodeId(nodeId);
+        builder.setSessionIdMSB(newId.getMostSignificantBits());
+        builder.setSessionIdLSB(newId.getLeastSignificantBits());
+        this.session = builder.build();
+    }
+
+
     private SessionInfoProto createSession(String nodeId, UUID sessionId, ValidateDeviceCredentialsResponse msg) {
         return SessionInfoProto.newBuilder()
                 .setNodeId(nodeId)

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mClientContext.java

@@ -55,4 +55,5 @@ public interface LwM2mClientContext {
 
     void registerClient(Registration registration, ValidateDeviceCredentialsResponse credentials);
 
+    void update(LwM2mClient lwM2MClient);
 }

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/client/LwM2mClientContextImpl.java

@@ -24,6 +24,7 @@ import org.eclipse.leshan.server.registration.Registration;
 import org.springframework.stereotype.Service;
 import org.thingsboard.server.common.data.DeviceProfile;
 import org.thingsboard.server.common.data.device.profile.Lwm2mDeviceProfileTransportConfiguration;
+import org.thingsboard.server.common.transport.TransportService;
 import org.thingsboard.server.common.transport.auth.ValidateDeviceCredentialsResponse;
 import org.thingsboard.server.gen.transport.TransportProtos;
 import org.thingsboard.server.queue.util.TbLwM2mTransportComponent;
@@ -31,6 +32,7 @@ import org.thingsboard.server.transport.lwm2m.config.LwM2MTransportServerConfig;
 import org.thingsboard.server.transport.lwm2m.secure.TbLwM2MSecurityInfo;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportContext;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil;
+import org.thingsboard.server.transport.lwm2m.server.session.LwM2MSessionManager;
 import org.thingsboard.server.transport.lwm2m.server.store.TbLwM2MClientStore;
 import org.thingsboard.server.transport.lwm2m.server.store.TbMainSecurityStore;
 
@@ -58,6 +60,7 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
     private final LwM2MTransportServerConfig config;
     private final TbMainSecurityStore securityStore;
     private final TbLwM2MClientStore clientStore;
+    private final LwM2MSessionManager sessionManager;
     private final Map<String, LwM2mClient> lwM2mClientsByEndpoint = new ConcurrentHashMap<>();
     private final Map<String, LwM2mClient> lwM2mClientsByRegistrationId = new ConcurrentHashMap<>();
     private final Map<UUID, Lwm2mDeviceProfileTransportConfiguration> profiles = new ConcurrentHashMap<>();
@@ -66,14 +69,23 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
     public LwM2mClient getClientByEndpoint(String endpoint) {
         return lwM2mClientsByEndpoint.computeIfAbsent(endpoint, ep -> {
             LwM2mClient client = clientStore.get(ep);
+            String nodeId = context.getNodeId();
             if (client == null) {
                 log.info("[{}] initialized new client.", endpoint);
-                client = new LwM2mClient(context.getNodeId(), ep);
+                client = new LwM2mClient(nodeId, ep);
             } else {
                 log.debug("[{}] fetched client from store: {}", endpoint, client);
+                boolean updated = false;
                 if (client.getRegistration() != null) {
                     lwM2mClientsByRegistrationId.put(client.getRegistration().getId(), client);
-                    //TODO: create ThingsBoard session.
+                }
+                if (client.getSession() != null) {
+                    client.refreshSessionId(nodeId);
+                    sessionManager.register(client.getSession());
+                    updated = true;
+                }
+                if (updated) {
+                    clientStore.put(client);
                 }
             }
             return client;
@@ -81,15 +93,15 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
     }
 
     @Override
-    public Optional<TransportProtos.SessionInfoProto> register(LwM2mClient lwM2MClient, Registration registration) throws LwM2MClientStateException {
+    public Optional<TransportProtos.SessionInfoProto> register(LwM2mClient client, Registration registration) throws LwM2MClientStateException {
         TransportProtos.SessionInfoProto oldSession = null;
-        lwM2MClient.lock();
+        client.lock();
         try {
-            if (LwM2MClientState.UNREGISTERED.equals(lwM2MClient.getState())) {
+            if (LwM2MClientState.UNREGISTERED.equals(client.getState())) {
-                throw new LwM2MClientStateException(lwM2MClient.getState(), "Client is in invalid state.");
+                throw new LwM2MClientStateException(client.getState(), "Client is in invalid state.");
             }
-            oldSession = lwM2MClient.getSession();
+            oldSession = client.getSession();
-            TbLwM2MSecurityInfo securityInfo = securityStore.getTbLwM2MSecurityInfoByEndpoint(lwM2MClient.getEndpoint());
+            TbLwM2MSecurityInfo securityInfo = securityStore.getTbLwM2MSecurityInfoByEndpoint(client.getEndpoint());
             if (securityInfo.getSecurityMode() != null) {
                 if (SecurityMode.X509.equals(securityInfo.getSecurityMode())) {
                     securityStore.registerX509(registration.getEndpoint(), registration.getId());
@@ -97,57 +109,57 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
                 if (securityInfo.getDeviceProfile() != null) {
                     profileUpdate(securityInfo.getDeviceProfile());
                     if (securityInfo.getSecurityInfo() != null) {
-                        lwM2MClient.init(securityInfo.getMsg(), UUID.randomUUID());
+                        client.init(securityInfo.getMsg(), UUID.randomUUID());
                     } else if (NO_SEC.equals(securityInfo.getSecurityMode())) {
-                        lwM2MClient.init(securityInfo.getMsg(), UUID.randomUUID());
+                        client.init(securityInfo.getMsg(), UUID.randomUUID());
                     } else {
-                        throw new RuntimeException(String.format("Registration failed: device %s not found.", lwM2MClient.getEndpoint()));
+                        throw new RuntimeException(String.format("Registration failed: device %s not found.", client.getEndpoint()));
                     }
                 } else {
-                    throw new RuntimeException(String.format("Registration failed: device %s not found.", lwM2MClient.getEndpoint()));
+                    throw new RuntimeException(String.format("Registration failed: device %s not found.", client.getEndpoint()));
                 }
             } else {
-                throw new RuntimeException(String.format("Registration failed: FORBIDDEN, endpointId: %s", lwM2MClient.getEndpoint()));
+                throw new RuntimeException(String.format("Registration failed: FORBIDDEN, endpointId: %s", client.getEndpoint()));
             }
-            lwM2MClient.setRegistration(registration);
+            client.setRegistration(registration);
-            this.lwM2mClientsByRegistrationId.put(registration.getId(), lwM2MClient);
+            this.lwM2mClientsByRegistrationId.put(registration.getId(), client);
-            lwM2MClient.setState(LwM2MClientState.REGISTERED);
+            client.setState(LwM2MClientState.REGISTERED);
-            clientStore.put(lwM2MClient);
+            clientStore.put(client);
         } finally {
-            lwM2MClient.unlock();
+            client.unlock();
         }
         return Optional.ofNullable(oldSession);
     }
 
     @Override
-    public void updateRegistration(LwM2mClient lwM2MClient, Registration registration) throws LwM2MClientStateException {
+    public void updateRegistration(LwM2mClient client, Registration registration) throws LwM2MClientStateException {
-        lwM2MClient.lock();
+        client.lock();
         try {
-            if (!LwM2MClientState.REGISTERED.equals(lwM2MClient.getState())) {
+            if (!LwM2MClientState.REGISTERED.equals(client.getState())) {
-                throw new LwM2MClientStateException(lwM2MClient.getState(), "Client is in invalid state.");
+                throw new LwM2MClientStateException(client.getState(), "Client is in invalid state.");
             }
-            lwM2MClient.setRegistration(registration);
+            client.setRegistration(registration);
-            clientStore.put(lwM2MClient);
+            clientStore.put(client);
         } finally {
-            lwM2MClient.unlock();
+            client.unlock();
         }
     }
 
     @Override
-    public void unregister(LwM2mClient lwM2MClient, Registration registration) throws LwM2MClientStateException {
+    public void unregister(LwM2mClient client, Registration registration) throws LwM2MClientStateException {
-        lwM2MClient.lock();
+        client.lock();
         try {
-            if (!LwM2MClientState.REGISTERED.equals(lwM2MClient.getState())) {
+            if (!LwM2MClientState.REGISTERED.equals(client.getState())) {
-                throw new LwM2MClientStateException(lwM2MClient.getState(), "Client is in invalid state.");
+                throw new LwM2MClientStateException(client.getState(), "Client is in invalid state.");
             }
             lwM2mClientsByRegistrationId.remove(registration.getId());
-            Registration currentRegistration = lwM2MClient.getRegistration();
+            Registration currentRegistration = client.getRegistration();
             if (currentRegistration.getId().equals(registration.getId())) {
-                lwM2MClient.setState(LwM2MClientState.UNREGISTERED);
+                client.setState(LwM2MClientState.UNREGISTERED);
-                lwM2mClientsByEndpoint.remove(lwM2MClient.getEndpoint());
+                lwM2mClientsByEndpoint.remove(client.getEndpoint());
-                this.securityStore.remove(lwM2MClient.getEndpoint(), registration.getId());
+                this.securityStore.remove(client.getEndpoint(), registration.getId());
-                clientStore.remove(lwM2MClient.getEndpoint());
+                clientStore.remove(client.getEndpoint());
-                UUID profileId = lwM2MClient.getProfileId();
+                UUID profileId = client.getProfileId();
                 if (profileId != null) {
                     Optional<LwM2mClient> otherClients = lwM2mClientsByRegistrationId.values().stream().filter(e -> e.getProfileId().equals(profileId)).findFirst();
                     if (otherClients.isEmpty()) {
@@ -155,19 +167,19 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
                     }
                 }
             } else {
-                throw new LwM2MClientStateException(lwM2MClient.getState(), "Client has different registration.");
+                throw new LwM2MClientStateException(client.getState(), "Client has different registration.");
             }
         } finally {
-            lwM2MClient.unlock();
+            client.unlock();
         }
     }
 
     @Override
     public LwM2mClient getClientBySessionInfo(TransportProtos.SessionInfoProto sessionInfo) {
         LwM2mClient lwM2mClient = null;
+        UUID sessionId = new UUID(sessionInfo.getSessionIdMSB(), sessionInfo.getSessionIdLSB());
         Predicate<LwM2mClient> isClientFilter = c ->
-                (new UUID(sessionInfo.getSessionIdMSB(), sessionInfo.getSessionIdLSB()))
+                sessionId.equals((new UUID(c.getSession().getSessionIdMSB(), c.getSession().getSessionIdLSB())));
-                        .equals((new UUID(c.getSession().getSessionIdMSB(), c.getSession().getSessionIdLSB())));
         if (this.lwM2mClientsByEndpoint.size() > 0) {
             lwM2mClient = this.lwM2mClientsByEndpoint.values().stream().filter(isClientFilter).findAny().orElse(null);
         }
@@ -175,19 +187,17 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
             lwM2mClient = this.lwM2mClientsByRegistrationId.values().stream().filter(isClientFilter).findAny().orElse(null);
         }
         if (lwM2mClient == null) {
-            log.warn("Device TimeOut? lwM2mClient is null.");
+            log.error("[{}] Failed to lookup client by session id.", sessionId);
-            log.warn("SessionInfo input [{}], lwM2mClientsByEndpoint size: [{}] lwM2mClientsByRegistrationId: [{}]", sessionInfo, lwM2mClientsByEndpoint.values(), lwM2mClientsByRegistrationId.values());
-            log.error("", new RuntimeException());
         }
         return lwM2mClient;
     }
 
     @Override
-    public String getObjectIdByKeyNameFromProfile(LwM2mClient lwM2mClient, String keyName) {
+    public String getObjectIdByKeyNameFromProfile(LwM2mClient client, String keyName) {
-        Lwm2mDeviceProfileTransportConfiguration profile = getProfile(lwM2mClient.getProfileId());
+        Lwm2mDeviceProfileTransportConfiguration profile = getProfile(client.getProfileId());
 
         return profile.getObserveAttr().getKeyName().entrySet().stream()
-                .filter(e -> e.getValue().equals(keyName) && validateResourceInModel(lwM2mClient, e.getKey(), false)).findFirst().orElseThrow(
+                .filter(e -> e.getValue().equals(keyName) && validateResourceInModel(client, e.getKey(), false)).findFirst().orElseThrow(
                         () -> new IllegalArgumentException(keyName + " is not configured in the device profile!")
                 ).getKey();
     }
@@ -204,6 +214,16 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
         profileUpdate(credentials.getDeviceProfile());
     }
 
+    @Override
+    public void update(LwM2mClient client) {
+        client.lock();
+        try {
+            clientStore.put(client);
+        } finally {
+            client.unlock();
+        }
+    }
+
     @Override
     public Collection<LwM2mClient> getLwM2mClients() {
         return lwM2mClientsByEndpoint.values();
@@ -221,9 +241,9 @@ public class LwM2mClientContextImpl implements LwM2mClientContext {
 
     @Override
     public Lwm2mDeviceProfileTransportConfiguration profileUpdate(DeviceProfile deviceProfile) {
-        Lwm2mDeviceProfileTransportConfiguration lwM2MClientProfile = LwM2mTransportUtil.toLwM2MClientProfile(deviceProfile);
+        Lwm2mDeviceProfileTransportConfiguration clientProfile = LwM2mTransportUtil.toLwM2MClientProfile(deviceProfile);
-        profiles.put(deviceProfile.getUuidId(), lwM2MClientProfile);
+        profiles.put(deviceProfile.getUuidId(), clientProfile);
-        return lwM2MClientProfile;
+        return clientProfile;
     }
 
     @Override

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/ota/DefaultLwM2MOtaUpdateService.java

@@ -52,6 +52,7 @@ import org.thingsboard.server.transport.lwm2m.server.ota.firmware.FirmwareUpdate
 import org.thingsboard.server.transport.lwm2m.server.ota.software.LwM2MSoftwareUpdateStrategy;
 import org.thingsboard.server.transport.lwm2m.server.ota.software.SoftwareUpdateResult;
 import org.thingsboard.server.transport.lwm2m.server.ota.software.SoftwareUpdateState;
+import org.thingsboard.server.transport.lwm2m.server.store.TbLwM2MClientOtaInfoStore;
 import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
 
 import javax.annotation.PostConstruct;
@@ -123,6 +124,7 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
     private final OtaPackageDataCache otaPackageDataCache;
     private final LwM2MTelemetryLogService logService;
     private final LwM2mTransportServerHelper helper;
+    private final TbLwM2MClientOtaInfoStore otaInfoStore;
 
     @Autowired
     @Lazy
@@ -174,6 +176,7 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
             }, throwable -> {
                 if (fwInfo.isSupported()) {
                     fwInfo.setTargetFetchFailure(true);
+                    update(fwInfo);
                 }
             }, executor);
         }
@@ -191,6 +194,7 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
     public void onTargetFirmwareUpdate(LwM2mClient client, String newFirmwareTitle, String newFirmwareVersion, Optional<String> newFirmwareUrl) {
         LwM2MClientOtaInfo fwInfo = getOrInitFwInfo(client);
         fwInfo.updateTarget(newFirmwareTitle, newFirmwareVersion, newFirmwareUrl);
+        update(fwInfo);
         startFirmwareUpdateIfNeeded(client, fwInfo);
     }
 
@@ -202,7 +206,7 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
     }
 
     @Override
-    public void onCurrentFirmwareStrategyUpdate(LwM2mClient client, OtherConfiguration configuration) {
+    public void onFirmwareStrategyUpdate(LwM2mClient client, OtherConfiguration configuration) {
         log.debug("[{}] Current fw strategy: {}", client.getEndpoint(), configuration.getFwUpdateStrategy());
         LwM2MClientOtaInfo fwInfo = getOrInitFwInfo(client);
         fwInfo.setFwStrategy(LwM2MFirmwareUpdateStrategy.fromStrategyFwByCode(configuration.getFwUpdateStrategy()));
@@ -242,9 +246,10 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
             executeFwUpdate(client);
         }
         fwInfo.setUpdateState(state);
-        Optional<OtaPackageUpdateStatus> status = this.toOtaPackageUpdateStatus(state);
+        Optional<OtaPackageUpdateStatus> status = toOtaPackageUpdateStatus(state);
         status.ifPresent(otaStatus -> sendStateUpdateToTelemetry(client, fwInfo,
                 otaStatus, "Firmware Update State: " + state.name()));
+        update(fwInfo);
     }
 
     @Override
@@ -252,15 +257,16 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
         log.debug("[{}] Current fw result: {}", client.getEndpoint(), code);
         LwM2MClientOtaInfo fwInfo = getOrInitFwInfo(client);
         FirmwareUpdateResult result = FirmwareUpdateResult.fromUpdateResultFwByCode(code.intValue());
-        Optional<OtaPackageUpdateStatus> status = this.toOtaPackageUpdateStatus(result);
+        Optional<OtaPackageUpdateStatus> status = toOtaPackageUpdateStatus(result);
         status.ifPresent(otaStatus -> sendStateUpdateToTelemetry(client, fwInfo,
                 otaStatus, "Firmware Update Result: " + result.name()));
         if (result.isAgain() && fwInfo.getRetryAttempts() <= 2) {
             fwInfo.setRetryAttempts(fwInfo.getRetryAttempts() + 1);
             startFirmwareUpdateIfNeeded(client, fwInfo);
         } else {
-            fwInfo.setUpdateResult(result);
+            fwInfo.update(result);
         }
+        update(fwInfo);
     }
 
     @Override
@@ -378,23 +384,38 @@ public class DefaultLwM2MOtaUpdateService extends LwM2MExecutorAwareService impl
     }
 
     public LwM2MClientOtaInfo getOrInitFwInfo(LwM2mClient client) {
-        //TODO: fetch state from the cache or DB.
         return this.fwStates.computeIfAbsent(client.getEndpoint(), endpoint -> {
+            LwM2MClientOtaInfo info = otaInfoStore.get(OtaPackageType.FIRMWARE, endpoint);
+            if (info == null) {
                 var profile = clientContext.getProfile(client.getProfileId());
-            return new LwM2MClientOtaInfo(endpoint, OtaPackageType.FIRMWARE, profile.getClientLwM2mSettings().getFwUpdateStrategy(),
+                info = new LwM2MClientOtaInfo(endpoint, OtaPackageType.FIRMWARE,
+                        LwM2MFirmwareUpdateStrategy.fromStrategyFwByCode(profile.getClientLwM2mSettings().getFwUpdateStrategy()),
                         profile.getClientLwM2mSettings().getFwUpdateResource());
+                update(info);
+            }
+            return info;
         });
     }
 
     private LwM2MClientOtaInfo getOrInitSwInfo(LwM2mClient client) {
-        //TODO: fetch state from the cache or DB.
+        return this.fwStates.computeIfAbsent(client.getEndpoint(), endpoint -> {
-        return swStates.computeIfAbsent(client.getEndpoint(), endpoint -> {
+            LwM2MClientOtaInfo info = otaInfoStore.get(OtaPackageType.SOFTWARE, endpoint);
+            if (info == null) {
                 var profile = clientContext.getProfile(client.getProfileId());
-            return new LwM2MClientOtaInfo(endpoint, OtaPackageType.SOFTWARE, profile.getClientLwM2mSettings().getSwUpdateStrategy(), profile.getClientLwM2mSettings().getSwUpdateResource());
+                info = new LwM2MClientOtaInfo(endpoint, OtaPackageType.SOFTWARE,
+                        LwM2MSoftwareUpdateStrategy.fromStrategySwByCode(profile.getClientLwM2mSettings().getFwUpdateStrategy()),
+                        profile.getClientLwM2mSettings().getSwUpdateResource());
+                update(info);
+            }
+            return info;
         });
 
     }
 
+    private void update(LwM2MClientOtaInfo info) {
+        otaInfoStore.put(info);
+    }
+
     private void sendStateUpdateToTelemetry(LwM2mClient client, LwM2MClientOtaInfo fwInfo, OtaPackageUpdateStatus status, String log) {
         List<TransportProtos.KeyValueProto> result = new ArrayList<>();
         TransportProtos.KeyValueProto.Builder kvProto = TransportProtos.KeyValueProto.newBuilder().setKey(getAttributeKey(fwInfo.getType(), STATE));

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/ota/LwM2MClientOtaInfo.java

@@ -15,7 +15,9 @@
  */
 package org.thingsboard.server.transport.lwm2m.server.ota;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.Data;
+import lombok.NoArgsConstructor;
 import org.thingsboard.server.common.data.StringUtils;
 import org.thingsboard.server.common.data.ota.OtaPackageType;
 import org.thingsboard.server.transport.lwm2m.server.ota.firmware.LwM2MFirmwareUpdateStrategy;
@@ -26,10 +28,11 @@ import org.thingsboard.server.transport.lwm2m.server.ota.software.LwM2MSoftwareU
 import java.util.Optional;
 
 @Data
+@NoArgsConstructor
 public class LwM2MClientOtaInfo {
 
-    private final String endpoint;
+    private String endpoint;
-    private final OtaPackageType type;
+    private OtaPackageType type;
 
     private String baseUrl;
 
@@ -53,10 +56,17 @@ public class LwM2MClientOtaInfo {
     private String failedPackageId;
     private int retryAttempts;
 
-    public LwM2MClientOtaInfo(String endpoint, OtaPackageType type, Integer strategyCode, String baseUrl) {
+    public LwM2MClientOtaInfo(String endpoint, OtaPackageType type, LwM2MFirmwareUpdateStrategy fwStrategy, String baseUrl) {
         this.endpoint = endpoint;
         this.type = type;
-        this.fwStrategy = LwM2MFirmwareUpdateStrategy.fromStrategyFwByCode(strategyCode);
+        this.fwStrategy = fwStrategy;
+        this.baseUrl = baseUrl;
+    }
+
+    public LwM2MClientOtaInfo(String endpoint, OtaPackageType type, LwM2MSoftwareUpdateStrategy swStrategy, String baseUrl) {
+        this.endpoint = endpoint;
+        this.type = type;
+        this.swStrategy = swStrategy;
         this.baseUrl = baseUrl;
     }
 
@@ -66,6 +76,7 @@ public class LwM2MClientOtaInfo {
         this.targetUrl = newFirmwareUrl.orElse(null);
     }
 
+    @JsonIgnore
     public boolean isUpdateRequired() {
         if (StringUtils.isEmpty(targetName) || StringUtils.isEmpty(targetVersion) || !isSupported()) {
             return false;
@@ -86,11 +97,12 @@ public class LwM2MClientOtaInfo {
         }
     }
 
+    @JsonIgnore
     public boolean isSupported() {
         return StringUtils.isNotEmpty(currentName) || StringUtils.isNotEmpty(currentVersion5) || StringUtils.isNotEmpty(currentVersion3);
     }
 
-    public void setUpdateResult(FirmwareUpdateResult updateResult) {
+    public void update(FirmwareUpdateResult updateResult) {
         this.updateResult = updateResult;
         switch (updateResult) {
             case INITIAL:

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/ota/LwM2MOtaUpdateService.java

@@ -32,7 +32,7 @@ public interface LwM2MOtaUpdateService {
 
     void onCurrentFirmwareNameUpdate(LwM2mClient client, String name);
 
-    void onCurrentFirmwareStrategyUpdate(LwM2mClient client, OtherConfiguration configuration);
+    void onFirmwareStrategyUpdate(LwM2mClient client, OtherConfiguration configuration);
 
     void onCurrentSoftwareStrategyUpdate(LwM2mClient client, OtherConfiguration configuration);
 

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/session/DefaultLwM2MSessionManager.java

@@ -0,0 +1,67 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.session;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.stereotype.Service;
+import org.thingsboard.server.common.transport.TransportService;
+import org.thingsboard.server.common.transport.service.DefaultTransportService;
+import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.queue.util.TbLwM2mTransportComponent;
+import org.thingsboard.server.transport.lwm2m.server.LwM2mSessionMsgListener;
+import org.thingsboard.server.transport.lwm2m.server.attributes.LwM2MAttributesService;
+import org.thingsboard.server.transport.lwm2m.server.rpc.LwM2MRpcRequestHandler;
+import org.thingsboard.server.transport.lwm2m.server.uplink.LwM2mUplinkMsgHandler;
+
+@Slf4j
+@Service
+@TbLwM2mTransportComponent
+public class DefaultLwM2MSessionManager implements LwM2MSessionManager {
+
+    private final TransportService transportService;
+    private final LwM2MAttributesService attributesService;
+    private final LwM2MRpcRequestHandler rpcHandler;
+    private final LwM2mUplinkMsgHandler uplinkHandler;
+
+    public DefaultLwM2MSessionManager(TransportService transportService,
+                                      @Lazy LwM2MAttributesService attributesService,
+                                      @Lazy LwM2MRpcRequestHandler rpcHandler,
+                                      @Lazy LwM2mUplinkMsgHandler uplinkHandler) {
+        this.transportService = transportService;
+        this.attributesService = attributesService;
+        this.rpcHandler = rpcHandler;
+        this.uplinkHandler = uplinkHandler;
+    }
+
+    @Override
+    public void register(TransportProtos.SessionInfoProto sessionInfo) {
+        transportService.registerAsyncSession(sessionInfo, new LwM2mSessionMsgListener(uplinkHandler, attributesService, rpcHandler, sessionInfo, transportService));
+        TransportProtos.TransportToDeviceActorMsg msg = TransportProtos.TransportToDeviceActorMsg.newBuilder()
+                .setSessionInfo(sessionInfo)
+                .setSessionEvent(DefaultTransportService.getSessionEventMsg(TransportProtos.SessionEvent.OPEN))
+                .setSubscribeToAttributes(TransportProtos.SubscribeToAttributeUpdatesMsg.newBuilder().setSessionType(TransportProtos.SessionType.ASYNC).build())
+                .setSubscribeToRPC(TransportProtos.SubscribeToRPCMsg.newBuilder().setSessionType(TransportProtos.SessionType.ASYNC).build())
+                .build();
+        transportService.process(msg, null);
+    }
+
+    @Override
+    public void deregister(TransportProtos.SessionInfoProto sessionInfo) {
+        transportService.process(sessionInfo, DefaultTransportService.getSessionEventMsg(TransportProtos.SessionEvent.CLOSED), null);
+        transportService.deregisterSession(sessionInfo);
+    }
+}

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/session/LwM2MSessionManager.java

@@ -0,0 +1,27 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.session;
+
+import org.thingsboard.server.gen.transport.TransportProtos;
+
+public interface LwM2MSessionManager {
+
+    void register(TransportProtos.SessionInfoProto sessionInfo);
+
+    void deregister(TransportProtos.SessionInfoProto sessionInfo);
+
+
+}

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbDummyLwM2MClientOtaInfoStore.java

@@ -0,0 +1,32 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.store;
+
+import org.thingsboard.server.common.data.ota.OtaPackageType;
+import org.thingsboard.server.transport.lwm2m.server.ota.LwM2MClientOtaInfo;
+
+public class TbDummyLwM2MClientOtaInfoStore implements TbLwM2MClientOtaInfoStore {
+
+    @Override
+    public LwM2MClientOtaInfo get(OtaPackageType type, String endpoint) {
+        return null;
+    }
+
+    @Override
+    public void put(LwM2MClientOtaInfo info) {
+
+    }
+}

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbDummyLwM2MClientStore.java

@@ -1,3 +1,18 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.store;
 
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbLwM2MClientOtaInfoStore.java

@@ -0,0 +1,26 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.store;
+
+import org.thingsboard.server.common.data.ota.OtaPackageType;
+import org.thingsboard.server.transport.lwm2m.server.ota.LwM2MClientOtaInfo;
+
+public interface TbLwM2MClientOtaInfoStore {
+
+    LwM2MClientOtaInfo get(OtaPackageType type, String endpoint);
+
+    void put(LwM2MClientOtaInfo info);
+}

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbLwM2MClientStore.java

@@ -1,3 +1,18 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.store;
 
 import org.thingsboard.server.transport.lwm2m.server.client.LwM2mClient;

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbLwM2mRedisClientOtaInfoStore.java

@@ -0,0 +1,54 @@
+/**
+ * Copyright © 2016-2021 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.transport.lwm2m.server.store;
+
+import org.eclipse.leshan.server.security.NonUniqueSecurityInfoException;
+import org.eclipse.leshan.server.security.SecurityInfo;
+import org.nustaq.serialization.FSTConfiguration;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.integration.redis.util.RedisLockRegistry;
+import org.thingsboard.common.util.JacksonUtil;
+import org.thingsboard.server.common.data.ota.OtaPackageType;
+import org.thingsboard.server.transport.lwm2m.secure.TbLwM2MSecurityInfo;
+import org.thingsboard.server.transport.lwm2m.server.ota.LwM2MClientOtaInfo;
+
+import java.util.concurrent.locks.Lock;
+
+public class TbLwM2mRedisClientOtaInfoStore implements TbLwM2MClientOtaInfoStore {
+    private static final String OTA_EP = "OTA#EP#";
+
+    private final RedisConnectionFactory connectionFactory;
+
+    public TbLwM2mRedisClientOtaInfoStore(RedisConnectionFactory connectionFactory) {
+        this.connectionFactory = connectionFactory;
+    }
+
+    @Override
+    public LwM2MClientOtaInfo get(OtaPackageType type, String endpoint) {
+        try (var connection = connectionFactory.getConnection()) {
+            byte[] data = connection.get((OTA_EP + type + endpoint).getBytes());
+            return JacksonUtil.fromBytes(data, LwM2MClientOtaInfo.class);
+        }
+    }
+
+    @Override
+    public void put(LwM2MClientOtaInfo info) {
+        try (var connection = connectionFactory.getConnection()) {
+            connection.set((OTA_EP + info.getType() + info.getEndpoint()).getBytes(), JacksonUtil.toString(info).getBytes());
+        }
+    }
+
+}

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/store/TbLwM2mStoreFactory.java

@@ -20,6 +20,7 @@ import org.eclipse.leshan.server.californium.registration.InMemoryRegistrationSt
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.stereotype.Component;
 import org.thingsboard.server.cache.TBRedisCacheConfiguration;
 import org.thingsboard.server.queue.util.TbLwM2mTransportComponent;
@@ -46,14 +47,14 @@ public class TbLwM2mStoreFactory {
 
     @Bean
     private CaliforniumRegistrationStore registrationStore() {
-        return redisConfiguration.isPresent() && useRedis ?
+        return isRedis() ?
-                new TbLwM2mRedisRegistrationStore(redisConfiguration.get().redisConnectionFactory()) : new InMemoryRegistrationStore(config.getCleanPeriodInSec());
+                new TbLwM2mRedisRegistrationStore(getConnectionFactory()) : new InMemoryRegistrationStore(config.getCleanPeriodInSec());
     }
 
     @Bean
     private TbMainSecurityStore securityStore() {
-        return new TbLwM2mSecurityStore(redisConfiguration.isPresent() && useRedis ?
+        return new TbLwM2mSecurityStore(isRedis() ?
-                new TbLwM2mRedisSecurityStore(redisConfiguration.get().redisConnectionFactory()) : new TbInMemorySecurityStore(), validator);
+                new TbLwM2mRedisSecurityStore(getConnectionFactory()) : new TbInMemorySecurityStore(), validator);
     }
 
     @Bean
@@ -61,10 +62,22 @@ public class TbLwM2mStoreFactory {
         return new TbDummyLwM2MClientStore();
     }
 
+    @Bean
+    private TbLwM2MClientOtaInfoStore otaStore() {
+        return isRedis() ? new TbLwM2mRedisClientOtaInfoStore(getConnectionFactory()) : new TbDummyLwM2MClientOtaInfoStore();
+    }
+
     @Bean
     private TbLwM2MDtlsSessionStore sessionStore() {
-        return redisConfiguration.isPresent() && useRedis ?
+        return isRedis() ? new TbLwM2MDtlsSessionRedisStore(getConnectionFactory()) : new TbL2M2MDtlsSessionInMemoryStore();
-                new TbLwM2MDtlsSessionRedisStore(redisConfiguration.get().redisConnectionFactory()) : new TbL2M2MDtlsSessionInMemoryStore();
+    }
+
+    private RedisConnectionFactory getConnectionFactory() {
+        return redisConfiguration.get().redisConnectionFactory();
+    }
+
+    private boolean isRedis() {
+        return redisConfiguration.isPresent() && useRedis;
     }
 
 }

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/DefaultLwM2MUplinkMsgHandler.java

@@ -48,15 +48,11 @@ import org.thingsboard.server.common.data.device.profile.Lwm2mDeviceProfileTrans
 import org.thingsboard.server.common.data.ota.OtaPackageUtil;
 import org.thingsboard.server.common.transport.TransportService;
 import org.thingsboard.server.common.transport.TransportServiceCallback;
-import org.thingsboard.server.common.transport.service.DefaultTransportService;
 import org.thingsboard.server.gen.transport.TransportProtos;
-import org.thingsboard.server.gen.transport.TransportProtos.SessionEvent;
 import org.thingsboard.server.gen.transport.TransportProtos.SessionInfoProto;
 import org.thingsboard.server.queue.util.TbLwM2mTransportComponent;
 import org.thingsboard.server.transport.lwm2m.config.LwM2MTransportServerConfig;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mOtaConvert;
-import org.thingsboard.server.transport.lwm2m.server.LwM2mQueuedRequest;
-import org.thingsboard.server.transport.lwm2m.server.LwM2mSessionMsgListener;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportContext;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportServerHelper;
 import org.thingsboard.server.transport.lwm2m.server.LwM2mTransportUtil;
@@ -84,6 +80,7 @@ import org.thingsboard.server.transport.lwm2m.server.downlink.TbLwM2MWriteAttrib
 import org.thingsboard.server.transport.lwm2m.server.log.LwM2MTelemetryLogService;
 import org.thingsboard.server.transport.lwm2m.server.ota.LwM2MOtaUpdateService;
 import org.thingsboard.server.transport.lwm2m.server.rpc.LwM2MRpcRequestHandler;
+import org.thingsboard.server.transport.lwm2m.server.session.LwM2MSessionManager;
 import org.thingsboard.server.transport.lwm2m.server.store.TbLwM2MDtlsSessionStore;
 import org.thingsboard.server.transport.lwm2m.utils.LwM2mValueConverterImpl;
 
@@ -129,6 +126,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
     private final TransportService transportService;
     private final LwM2mTransportContext context;
     private final LwM2MAttributesService attributesService;
+    private final LwM2MSessionManager sessionManager;
     private final LwM2MOtaUpdateService otaService;
     private final LwM2MTransportServerConfig config;
     private final LwM2MTelemetryLogService logService;
@@ -143,12 +141,14 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
                                         LwM2mTransportServerHelper helper,
                                         LwM2mClientContext clientContext,
                                         LwM2MTelemetryLogService logService,
+                                        LwM2MSessionManager sessionManager,
                                         @Lazy LwM2MOtaUpdateService otaService,
                                         @Lazy LwM2MAttributesService attributesService,
                                         @Lazy LwM2MRpcRequestHandler rpcHandler,
                                         @Lazy LwM2mDownlinkMsgHandler defaultLwM2MDownlinkMsgHandler,
                                         LwM2mTransportContext context, TbLwM2MDtlsSessionStore sessionStore) {
         this.transportService = transportService;
+        this.sessionManager = sessionManager;
         this.attributesService = attributesService;
         this.otaService = otaService;
         this.config = config;
@@ -205,18 +205,10 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
                 Optional<SessionInfoProto> oldSessionInfo = this.clientContext.register(lwM2MClient, registration);
                 if (oldSessionInfo.isPresent()) {
                     log.info("[{}] Closing old session: {}", registration.getEndpoint(), new UUID(oldSessionInfo.get().getSessionIdMSB(), oldSessionInfo.get().getSessionIdLSB()));
-                    closeSession(oldSessionInfo.get());
+                    sessionManager.deregister(oldSessionInfo.get());
                 }
                 logService.log(lwM2MClient, LOG_LWM2M_INFO + ": Client registered with registration id: " + registration.getId());
-                SessionInfoProto sessionInfo = lwM2MClient.getSession();
+                sessionManager.register(lwM2MClient.getSession());
-                transportService.registerAsyncSession(sessionInfo, new LwM2mSessionMsgListener(this, attributesService, rpcHandler, sessionInfo, transportService));
-                TransportProtos.TransportToDeviceActorMsg msg = TransportProtos.TransportToDeviceActorMsg.newBuilder()
-                        .setSessionInfo(sessionInfo)
-                        .setSessionEvent(DefaultTransportService.getSessionEventMsg(SessionEvent.OPEN))
-                        .setSubscribeToAttributes(TransportProtos.SubscribeToAttributeUpdatesMsg.newBuilder().setSessionType(TransportProtos.SessionType.ASYNC).build())
-                        .setSubscribeToRPC(TransportProtos.SubscribeToRPCMsg.newBuilder().setSessionType(TransportProtos.SessionType.ASYNC).build())
-                        .build();
-                transportService.process(msg, null);
                 this.initClientTelemetry(lwM2MClient);
                 this.initAttributes(lwM2MClient);
                 otaService.init(lwM2MClient);
@@ -273,7 +265,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
                 clientContext.unregister(client, registration);
                 SessionInfoProto sessionInfo = client.getSession();
                 if (sessionInfo != null) {
-                    closeSession(sessionInfo);
+                    sessionManager.deregister(sessionInfo);
                     sessionStore.remove(registration.getEndpoint());
                     log.info("Client close session: [{}] unReg [{}] name  [{}] profile ", registration.getId(), registration.getEndpoint(), sessionInfo.getDeviceType());
                 } else {
@@ -288,11 +280,6 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         });
     }
 
-    public void closeSession(SessionInfoProto sessionInfo) {
-        transportService.process(sessionInfo, DefaultTransportService.getSessionEventMsg(SessionEvent.CLOSED), null);
-        transportService.deregisterSession(sessionInfo);
-    }
-
     @Override
     public void onSleepingDev(Registration registration) {
         log.info("[{}] [{}] Received endpoint Sleeping version event", registration.getId(), registration.getEndpoint());
@@ -300,19 +287,6 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         //TODO: associate endpointId with device information.
     }
 
-//    /**
-//     * Cancel observation for All objects for this registration
-//     */
-//    @Override
-//    public void setCancelObservationsAll(Registration registration) {
-//        if (registration != null) {
-//            LwM2mClient client = clientContext.getClientByEndpoint(registration.getEndpoint());
-//            if (client != null && client.getRegistration() != null && client.getRegistration().getId().equals(registration.getId())) {
-//                defaultLwM2MDownlinkMsgHandler.sendCancelAllRequest(client, TbLwM2MCancelAllRequest.builder().build(), new TbLwM2MCancelAllObserveRequestCallback(this, client));
-//            }
-//        }
-//    }
-
     /**
      * Sending observe value to thingsboard from ObservationListener.onResponse: object, instance, SingleResource or MultipleResource
      *
@@ -337,6 +311,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
                     this.updateResourcesValue(lwM2MClient, lwM2mResource, path);
                 }
             }
+            clientContext.update(lwM2MClient);
         }
     }
 
@@ -375,16 +350,6 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         clientContext.getLwM2mClients().forEach(e -> e.deleteResources(pathIdVer, this.config.getModelProvider()));
     }
 
-    /**
-     * Deregister session in transport
-     *
-     * @param sessionInfo - lwm2m client
-     */
-    @Override
-    public void doDisconnect(SessionInfoProto sessionInfo) {
-        closeSession(sessionInfo);
-    }
-
     /**
      * Those methods are called by the protocol stage thread pool, this means that execution MUST be done in a short delay,
      * * if you need to do long time processing use a dedicated thread pool.
@@ -479,14 +444,6 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         attributesMap.forEach((targetId, params) -> sendWriteAttributesRequest(lwM2MClient, targetId, params));
     }
 
-    private void sendDiscoverRequests(LwM2mClient lwM2MClient, Lwm2mDeviceProfileTransportConfiguration profile, Set<String> supportedObjects) {
-        Set<String> targetIds = profile.getObserveAttr().getAttributeLwm2m().keySet();
-        targetIds = targetIds.stream().filter(target -> isSupportedTargetId(supportedObjects, target)).collect(Collectors.toSet());
-//        TODO: why do we need to put observe into pending read requests?
-//        lwM2MClient.getPendingReadRequests().addAll(targetIds);
-        targetIds.forEach(targetId -> sendDiscoverRequest(lwM2MClient, targetId));
-    }
-
     private void sendDiscoverRequest(LwM2mClient lwM2MClient, String targetId) {
         TbLwM2MDiscoverRequest request = TbLwM2MDiscoverRequest.builder().versionedId(targetId).timeout(this.config.getTimeout()).build();
         defaultLwM2MDownlinkMsgHandler.sendDiscoverRequest(lwM2MClient, request, new TbLwM2MDiscoverCallback(logService, lwM2MClient, targetId));
@@ -637,7 +594,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
             List<TransportProtos.KeyValueProto> resultAttributes = new ArrayList<>();
             profile.getObserveAttr().getAttribute().forEach(pathIdVer -> {
                 if (path.contains(pathIdVer)) {
-                    TransportProtos.KeyValueProto kvAttr = this.getKvToThingsboard(pathIdVer, registration);
+                    TransportProtos.KeyValueProto kvAttr = this.getKvToThingsBoard(pathIdVer, registration);
                     if (kvAttr != null) {
                         resultAttributes.add(kvAttr);
                     }
@@ -646,7 +603,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
             List<TransportProtos.KeyValueProto> resultTelemetries = new ArrayList<>();
             profile.getObserveAttr().getTelemetry().forEach(pathIdVer -> {
                 if (path.contains(pathIdVer)) {
-                    TransportProtos.KeyValueProto kvAttr = this.getKvToThingsboard(pathIdVer, registration);
+                    TransportProtos.KeyValueProto kvAttr = this.getKvToThingsBoard(pathIdVer, registration);
                     if (kvAttr != null) {
                         resultTelemetries.add(kvAttr);
                     }
@@ -663,7 +620,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
         return null;
     }
 
-    private TransportProtos.KeyValueProto getKvToThingsboard(String pathIdVer, Registration registration) {
+    private TransportProtos.KeyValueProto getKvToThingsBoard(String pathIdVer, Registration registration) {
         LwM2mClient lwM2MClient = this.clientContext.getClientByEndpoint(registration.getEndpoint());
         Map<String, String> names = clientContext.getProfile(lwM2MClient.getProfileId()).getObserveAttr().getKeyName();
         if (names != null && names.containsKey(pathIdVer)) {
@@ -710,10 +667,12 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
     public void onWriteResponseOk(LwM2mClient client, String path, WriteRequest request) {
         if (request.getNode() instanceof LwM2mResource) {
             this.updateResourcesValue(client, ((LwM2mResource) request.getNode()), path);
+            clientContext.update(client);
         } else if (request.getNode() instanceof LwM2mObjectInstance) {
             ((LwM2mObjectInstance) request.getNode()).getResources().forEach((resId, resource) -> {
                 this.updateResourcesValue(client, resource, path + "/" + resId);
             });
+            clientContext.update(client);
         }
     }
 
@@ -788,7 +747,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
             if (!newLwM2mSettings.getFwUpdateStrategy().equals(oldLwM2mSettings.getFwUpdateStrategy())
                     || (StringUtils.isNotEmpty(newLwM2mSettings.getFwUpdateResource()) &&
                     !newLwM2mSettings.getFwUpdateResource().equals(oldLwM2mSettings.getFwUpdateResource()))) {
-                clients.forEach(lwM2MClient -> otaService.onCurrentFirmwareStrategyUpdate(lwM2MClient, newLwM2mSettings));
+                clients.forEach(lwM2MClient -> otaService.onFirmwareStrategyUpdate(lwM2MClient, newLwM2mSettings));
             }
 
             if (!newLwM2mSettings.getSwUpdateStrategy().equals(oldLwM2mSettings.getSwUpdateStrategy())
@@ -893,7 +852,7 @@ public class DefaultLwM2MUplinkMsgHandler extends LwM2MExecutorAwareService impl
      */
     private void reportActivityAndRegister(SessionInfoProto sessionInfo) {
         if (sessionInfo != null && transportService.reportActivity(sessionInfo) == null) {
-            transportService.registerAsyncSession(sessionInfo, new LwM2mSessionMsgListener(this, attributesService, rpcHandler, sessionInfo, transportService));
+            sessionManager.register(sessionInfo);
             this.reportActivitySubscription(sessionInfo);
         }
     }

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/uplink/LwM2mUplinkMsgHandler.java

@@ -48,8 +48,6 @@ public interface LwM2mUplinkMsgHandler {
 
     void onResourceDelete(Optional<TransportProtos.ResourceDeleteMsg> resourceDeleteMsgOpt);
 
-    void doDisconnect(TransportProtos.SessionInfoProto sessionInfo);
-
     void onAwakeDev(Registration registration);
 
     void onWriteResponseOk(LwM2mClient client, String path, WriteRequest request);

common/util/src/main/java/org/thingsboard/common/util/JacksonUtil.java

@@ -67,6 +67,15 @@ public class JacksonUtil {
         }
     }
 
+    public static <T> T fromBytes(byte[] bytes, Class<T> clazz) {
+        try {
+            return bytes != null ? OBJECT_MAPPER.readValue(bytes, clazz) : null;
+        } catch (IOException e) {
+            throw new IllegalArgumentException("The given string value: "
+                    + Arrays.toString(bytes) + " cannot be transformed to Json object", e);
+        }
+    }
+
     public static JsonNode fromBytes(byte[] bytes) {
         try {
             return OBJECT_MAPPER.readTree(bytes);
@@ -96,7 +105,7 @@ public class JacksonUtil {
         }
     }
 
-    public static ObjectNode newObjectNode(){
+    public static ObjectNode newObjectNode() {
         return OBJECT_MAPPER.createObjectNode();
     }