diff --git a/sdk/src/main/java/org/zstack/sdk/ApiResult.java b/sdk/src/main/java/org/zstack/sdk/ApiResult.java
index 4fc044da..eab3970c 100644
--- a/sdk/src/main/java/org/zstack/sdk/ApiResult.java
+++ b/sdk/src/main/java/org/zstack/sdk/ApiResult.java
@@ -50,7 +50,7 @@ private static Object getProperty(Object bean, Iterator<String> it) throws Illeg
                 return val;
             }
         } catch (NoSuchMethodException e) {
-            logger.log(Level.WARNING, "Warning: NoSuchMethodException occurred. Details: ", e.getMessage());
+            logger.log(Level.WARNING, "Warning: NoSuchMethodException occurred. Details: {0}", e.getMessage());
             return null;
         }
     }