diff --git a/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java b/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
index 7799a805..61e9e971 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/kurento/core/KurentoSessionManager.java
@@ -118,7 +118,6 @@ public class KurentoSessionManager extends SessionManager {
 						} finally {
 							KmsManager.selectAndRemoveKmsLock.unlock();
 						}
-
 					} else {
 						String error = "Timeout of " + KmsManager.MAX_SECONDS_LOCK_WAIT
 								+ " seconds waiting to acquire lock";
@@ -1174,7 +1173,7 @@ public class KurentoSessionManager extends SessionManager {
 			this.cleanCollections(session.getSessionId());
 			this.storeSessionNotActive(session);
 			throw new OpenViduException(Code.ROOM_CANNOT_BE_CREATED_ERROR_CODE,
-					"There is no available Media Node where to initialize session '" + session + "'");
+					"There is no available Media Node where to initialize session '" + session.getSessionId() + "'");
 		}
 		log.info("KMS less loaded is {} with a load of {}", lessLoadedKms.getUri(), lessLoadedKms.getLoad());
 		return lessLoadedKms;
diff --git a/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManager.java b/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManager.java
index cfad5e5c..46a91680 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManager.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManager.java
@@ -12,4 +12,6 @@ public interface MediaNodeStatusManager {
 
 	public boolean isWaitingIdleToTerminate(String mediaNodeId);
 
+	public String instanceStatus(String mediaNodeId);
+
 }
diff --git a/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManagerDummy.java b/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManagerDummy.java
index d0eacd25..1b35f3be 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManagerDummy.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/utils/MediaNodeStatusManagerDummy.java
@@ -27,4 +27,9 @@ public class MediaNodeStatusManagerDummy implements MediaNodeStatusManager {
 		return false;
 	}
 
+	@Override
+	public String instanceStatus(String mediaNodeId) {
+		return null;
+	}
+
 }