Merge pull request #13709 from smatvienko-tb/hotfix/MqttClient-reduce-log-severity-for-reconnect

Reduced log severity to debug for Scheduling reconnect message to avoid log flood under high-load. Logs are made more informative.

netty-mqtt/src/main/java/org/thingsboard/mqtt/MqttClientImpl.java

@@ -192,14 +192,14 @@ final class MqttClientImpl implements MqttClient {
     }
 
     private void scheduleConnectIfRequired(String host, int port, boolean reconnect) {
-        log.trace("[{}] Scheduling connect to server, isReconnect - {}", channel != null ? channel.id() : "UNKNOWN", reconnect);
+        log.trace("[{}][{}][{}] Scheduling connect to server, isReconnect - {}", host, port, channel != null ? channel.id() : "UNKNOWN", reconnect);
         if (clientConfig.isReconnect() && !disconnected) {
             if (reconnect) {
                 this.reconnect = true;
             }
 
             final long nextReconnectDelay = reconnectStrategy.getNextReconnectDelay();
-            log.info("[{}] Scheduling reconnect in [{}] sec", channel != null ? channel.id() : "UNKNOWN", nextReconnectDelay);
+            log.debug("[{}][{}][{}] Scheduling reconnect in [{}] sec", host, port, channel != null ? channel.id() : "UNKNOWN", nextReconnectDelay);
             eventLoop.schedule((Runnable) () -> connect(host, port, reconnect), nextReconnectDelay, TimeUnit.SECONDS);
         }
     }