diff --git a/src/main/java/org/gcube/portlets/user/workspace/server/LocalUploadServlet.java b/src/main/java/org/gcube/portlets/user/workspace/server/LocalUploadServlet.java
index ef3f567..81525ff 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/server/LocalUploadServlet.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/server/LocalUploadServlet.java
@@ -452,7 +452,9 @@ public class LocalUploadServlet extends HttpServlet {
 			response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 			HandlerResultMessage resultMessage = HandlerResultMessage.errorResult(message);
 			response.getWriter().write(resultMessage.toString());
-			response.flushBuffer();
+			//5.6 Closure of Response Object:
+			//When a response is closed, the container must immediately flush all remaining content in the response buffer to the client
+//			response.flushBuffer();
 		} catch (IOException e){
 			logger.warn("IOException class name: "+e.getClass().getSimpleName());
 			if (e.getClass().getSimpleName().equals("ClientAbortException"))
@@ -467,7 +469,9 @@ public class LocalUploadServlet extends HttpServlet {
 			response.setStatus(HttpServletResponse.SC_ACCEPTED);
 			HandlerResultMessage resultMessage = HandlerResultMessage.okResult(message);
 			response.getWriter().write(resultMessage.toString());
-			response.flushBuffer();
+			//5.6 Closure of Response Object:
+			//When a response is closed, the container must immediately flush all remaining content in the response buffer to the client
+//			response.flushBuffer();
 		} catch (IOException e){
 			logger.warn("IOException class name: "+e.getClass().getSimpleName());
 			if (e.getClass().getSimpleName().equals("ClientAbortException"))
@@ -482,7 +486,9 @@ public class LocalUploadServlet extends HttpServlet {
 			response.setStatus(HttpServletResponse.SC_ACCEPTED);
 			HandlerResultMessage resultMessage = HandlerResultMessage.warnResult(message);
 			response.getWriter().write(resultMessage.toString());
-			response.flushBuffer();
+			//5.6 Closure of Response Object:
+			//When a response is closed, the container must immediately flush all remaining content in the response buffer to the client
+//			response.flushBuffer();
 		} catch (IOException e){
 			logger.warn("IOException class name: "+e.getClass().getSimpleName());
 			if (e.getClass().getSimpleName().equals("ClientAbortException"))