diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
index 89f9e6f..0838a78 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
@@ -9267,6 +9267,8 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 			throws TDGWTServiceException {
 		HttpServletRequest httpRequest = null;
 		try {
+			logger.info("StartDataMinerOperation");
+			logger.debug("StartDataMinerOperation: "+dataMinerOperationSession);
 			httpRequest = this.getThreadLocalRequest();
 			ServiceCredentials serviceCredentials = SessionUtil
 					.getServiceCredentials(httpRequest);