diff --git a/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java b/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
index 2618bac..1744ca3 100644
--- a/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
+++ b/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
@@ -198,6 +198,12 @@ public class PersistenceCouchBase extends PersistenceBackend {
 			Connections.connectionsMap.remove(nodes);	
 			logger.trace("PersistenceCouchBase disconnect" );
 		}
+	}
+
+	@Override
+	protected void closeConnection() throws Exception {
+		
+		logger.debug("PersistenceCouchBase closeConnection" );
 	};