fixed double sending rpc and timeout for lwm2m

application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java

@@ -619,7 +619,7 @@ class DeviceActorMessageProcessor extends AbstractContextAwareMsgProcessor {
             if (md.getMsg().getMsg().isPersisted()) {
                 systemContext.getTbRpcService().save(tenantId, new RpcId(rpcId), status, null);
             }
-            if (status != RpcStatus.SENT) {
+            if (status != RpcStatus.SENT && !(status == RpcStatus.FAILED && md.isDelivered())) {
                 sendNextPendingRequest(context);
             }
         } else {

common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/rpc/RpcDownlinkRequestCallbackProxy.java

@@ -67,7 +67,7 @@ public abstract class RpcDownlinkRequestCallbackProxy<R, T> implements DownlinkR
 
     @Override
     public void onError(String params, Exception e) {
-        if (e instanceof TimeoutException) {
+        if (e instanceof TimeoutException || e instanceof org.eclipse.leshan.core.request.exception.TimeoutException) {
             transportService.process(client.getSession(), this.request, RpcStatus.TIMEOUT, TransportServiceCallback.EMPTY);
         } else if (!(e instanceof ClientSleepingException)) {
             sendRpcReplyOnError(e);