diff --git a/src/main/java/org/gcube/smartgears/utils/sweeper/Sweeper.java b/src/main/java/org/gcube/smartgears/utils/sweeper/Sweeper.java
index a5bc65b..3698ff7 100644
--- a/src/main/java/org/gcube/smartgears/utils/sweeper/Sweeper.java
+++ b/src/main/java/org/gcube/smartgears/utils/sweeper/Sweeper.java
@@ -66,7 +66,7 @@ public class Sweeper {
 				contextBeans.add(new ContextBean(token, entry.getContext()));
 			}
 		}catch(Exception e){
-			throw new RuntimeException("error loading persisted state");
+			throw new RuntimeException("error loading persisted state",e);
 		}	
 	}