diff --git a/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java b/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
index f67db17..10997db 100644
--- a/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
+++ b/src/main/java/org/gcube/documentstore/persistence/PersistenceCouchBase.java
@@ -11,6 +11,8 @@ import org.gcube.documentstore.persistence.PersistenceBackend;
 import org.gcube.documentstore.persistence.PersistenceBackendConfiguration;
 import org.gcube.documentstore.records.Record;
 import org.gcube.documentstore.records.RecordUtility;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import com.couchbase.client.deps.com.fasterxml.jackson.databind.JsonNode;
 import com.couchbase.client.deps.com.fasterxml.jackson.databind.ObjectMapper;
@@ -50,7 +52,8 @@ public class PersistenceCouchBase extends PersistenceBackend {
 	public static final String BUCKET_TASK_NAME_PROPERTY_KEY="AggregatedTaskUsageRecord";
 	public static final String BUCKET_TASK_TYPE="TaskUsageRecord";
 	
-	
+	private static final Logger logger = LoggerFactory
+			.getLogger(PersistenceCouchBase.class);
 	
     /* The environment configuration */
     protected static final CouchbaseEnvironment ENV = 
@@ -83,6 +86,8 @@ public class PersistenceCouchBase extends PersistenceBackend {
     
     private Map <String, Bucket> connectionMap;
     
+    
+    
 	/**
 	 * {@inheritDoc}
 	 */
@@ -94,6 +99,9 @@ public class PersistenceCouchBase extends PersistenceBackend {
 		
 		cluster = CouchbaseCluster.create(ENV, url);
 		
+		
+		logger.trace("cluster: {}",url);
+		
 		bucketNameStorage = configuration.getProperty(BUCKET_STORAGE_NAME_PROPERTY_KEY);
 		bucketNameService = configuration.getProperty(BUCKET_SERVICE_NAME_PROPERTY_KEY);
 		bucketNameJob = configuration.getProperty(BUCKET_JOB_NAME_PROPERTY_KEY);
@@ -119,11 +127,18 @@ public class PersistenceCouchBase extends PersistenceBackend {
 		
 		bucket = cluster.openBucket(
 				configuration.getProperty(BUCKET_NAME_PROPERTY_KEY), password);
+		
+		
+		
+		
 	}
 	
 	protected JsonDocument createItem(JsonObject jsonObject, String id,String recordType) throws Exception {
 		JsonDocument doc = JsonDocument.create(id, jsonObject);
 		
+		logger.trace("record type:{}",recordType);
+		
+		
 		return connectionMap.get(recordType).upsert(doc);
 		//return bucket.upsert(doc);
 	}