diff --git a/src/main/java/org/gcube/portlets/user/speciesdiscovery/client/SearchController.java b/src/main/java/org/gcube/portlets/user/speciesdiscovery/client/SearchController.java
index 237b1d6..3af960d 100644
--- a/src/main/java/org/gcube/portlets/user/speciesdiscovery/client/SearchController.java
+++ b/src/main/java/org/gcube/portlets/user/speciesdiscovery/client/SearchController.java
@@ -824,6 +824,11 @@ public class SearchController {
 		
 		searchBorderLayoutPanel.getSpeciesCenterPanel().setMaskGridPanel(mask);
 		
+		if(mask)
+			searchBorderLayoutPanel.getSpeciesWestPanel().mask();
+		else
+			searchBorderLayoutPanel.getSpeciesWestPanel().unmask();
+		
 		searchBorderLayoutPanel.getSpeciesNorthPanel().activeButtonSearch(!mask);
 	}
 
diff --git a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/TaxonomySearchServiceImpl.java b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/TaxonomySearchServiceImpl.java
index 4b94f85..1220a26 100644
--- a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/TaxonomySearchServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/TaxonomySearchServiceImpl.java
@@ -238,13 +238,13 @@ public class TaxonomySearchServiceImpl extends RemoteServiceServlet implements T
 			CloseableIterator<ResultElement> input = taxonomyService.searchByQuery(query);
 			
 			//DEBUG
-			System.out.println("returned input stream by service...");
-			logger.trace("returned input stream by service...");
+//			System.out.println("service return iterator searched...");
+			logger.trace("service return iterator searched...");
 			
 			SearchResultType resultType = QueryUtil.getQueryResultType(query);
 			CloseableIterator<FetchingElement> output = IteratorChainBuilder.buildChain(input, resultType, aslSession);
 			FetchingSessionUtil.createFetchingSession(output, resultType, aslSession);
-
+			logger.trace("creating fetching session completed!");
 			return resultType;
 
 		} catch (Exception e) {
@@ -286,6 +286,7 @@ public class TaxonomySearchServiceImpl extends RemoteServiceServlet implements T
 			if(daoTaxonomyRow!=null)
 				daoTaxonomyRow.removeAll();
 
+			logger.trace("delete all row from Dao's - completed");
 		} catch (Exception e) {
 			logger.error("Error in delete all row");
 			throw new Exception("Error in delete all row" + e.getCause(), e);
@@ -624,7 +625,7 @@ public class TaxonomySearchServiceImpl extends RemoteServiceServlet implements T
 	 * {@inheritDoc}
 	 */
 	public void stopSearchWithoutRemove() throws SearchServiceException {
-		logger.trace("stopSearch()");
+		logger.trace("stopSearch without Remove");
 
 		ASLSession session = getASLSession();
 		//we safely get the session if exists
@@ -644,7 +645,7 @@ public class TaxonomySearchServiceImpl extends RemoteServiceServlet implements T
 	 */
 	@Override
 	public void stopSearch() throws SearchServiceException {
-		logger.trace("stopSearch()");
+		logger.trace("stopSearch");
 
 		ASLSession session = getASLSession();
 		FetchingSession<? extends FetchingElement> searchSession = SessionUtil.getCurrentSearchSession(session);
diff --git a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/service/SpeciesService.java b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/service/SpeciesService.java
index 37013ce..270df17 100644
--- a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/service/SpeciesService.java
+++ b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/service/SpeciesService.java
@@ -104,7 +104,7 @@ public class SpeciesService {
 		logger.trace("searchByFilters searchTerm: "+searchTerm+ " usearchFilters: "+searchFilters);
 
 		try {
-			System.out.println("query building...");
+			logger.trace("query building...");
 			String query = QueryBuilder.buildQuery(searchTerm, searchType, searchFilters);
 //			System.out.println("query build - OK " + query);
 			logger.trace("query build - OK " + query);
@@ -146,7 +146,7 @@ public class SpeciesService {
 
 
 	public CloseableIterator<ResultElement> searchByQuery(String query) throws SearchServiceException {
-		logger.trace("searchByQuery query: "+query);
+		logger.trace("search by Query - query is: "+query);
 //		System.out.println("searchByQuery query: "+query);
 
 		try {
diff --git a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/session/FetchingSession.java b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/session/FetchingSession.java
index 09ca8b6..102dda5 100644
--- a/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/session/FetchingSession.java
+++ b/src/main/java/org/gcube/portlets/user/speciesdiscovery/server/session/FetchingSession.java
@@ -6,6 +6,7 @@ package org.gcube.portlets.user.speciesdiscovery.server.session;
 import java.io.Closeable;
 import java.io.IOException;
 import java.sql.SQLException;
+import java.util.concurrent.TimeUnit;
 
 import org.apache.log4j.Logger;
 import org.gcube.portlets.user.speciesdiscovery.server.stream.Aggregator;
@@ -61,10 +62,30 @@ public class FetchingSession<T extends FetchingElement> implements Closeable {
 
 	public void close() throws IOException
 	{
-		logger.trace("fetcherThread close...");
-		fetcher.close();
-//		logger.trace("###fetcherThread close - OK");
-		logger.trace("###fetcherThread close - OK");
+		
+		new Thread(){
+			@Override
+			public void run() {
+				try {
+					
+					Long startTime =  System.currentTimeMillis();
+					logger.trace("##new thread run for closing old fetcher... time: "+startTime);
+					
+					fetcher.close();
+					//logger.trace("###fetcherThread close - OK");
+
+					Long endTime = System.currentTimeMillis() - startTime;
+					String time = String.format("%d msc %d sec", endTime, TimeUnit.MILLISECONDS.toSeconds(endTime));
+					
+					logger.trace("##old fetcher has been closed.. in " + time);
+					
+				} catch (IOException e) {
+					logger.error("An error occurred in fetcher Thread close ",e);
+					e.printStackTrace();
+				}
+			};
+		}.start();
+
 	}
 
 	public boolean isComplete()