diff --git a/designer-base/src/main/java/com/fr/design/data/datapane/connect/ConnectionListPane.java b/designer-base/src/main/java/com/fr/design/data/datapane/connect/ConnectionListPane.java
index 974f8b0d7b..d1e85492d1 100644
--- a/designer-base/src/main/java/com/fr/design/data/datapane/connect/ConnectionListPane.java
+++ b/designer-base/src/main/java/com/fr/design/data/datapane/connect/ConnectionListPane.java
@@ -334,7 +334,7 @@ public class ConnectionListPane extends JListControlPane implements ConnectionSh
     }
 
 
-    private void alterConnections(List<ConnectionInfoBean> addConnections, List<String> removedConnNames, List<ConnectionInfoBean> updateConnection) {
+    private void alterConnections(List<ConnectionInfoBean> addConnections, List<String> removedConnNames, List<ConnectionInfoBean> updateConnection) throws Exception {
 
         try {
             for (ConnectionInfoBean bean : addConnections) {
@@ -352,6 +352,7 @@ public class ConnectionListPane extends JListControlPane implements ConnectionSh
             }
         } catch (Exception e) {
             FineLoggerFactory.getLogger().error(e.getMessage(), e);
+            throw e;
         }
     }
 
diff --git a/designer-base/src/main/java/com/fr/design/data/datapane/connect/JDBCDefPane.java b/designer-base/src/main/java/com/fr/design/data/datapane/connect/JDBCDefPane.java
index 988ad0c94a..e8c7c17b8e 100644
--- a/designer-base/src/main/java/com/fr/design/data/datapane/connect/JDBCDefPane.java
+++ b/designer-base/src/main/java/com/fr/design/data/datapane/connect/JDBCDefPane.java
@@ -451,8 +451,8 @@ public class JDBCDefPane extends JPanel {
         jdbcDatabase.setPassword(new String(this.passwordTextField.getPassword()).trim());
         jdbcDatabase.setOriginalCharsetName(this.originalCharSet);
         if (this.charSetComboBox.getSelectedIndex() == 0) {
-            jdbcDatabase.setNewCharsetName(StringUtils.EMPTY);
-            jdbcDatabase.setOriginalCharsetName(StringUtils.EMPTY);
+            jdbcDatabase.setNewCharsetName(null);
+            jdbcDatabase.setOriginalCharsetName(null);
         } else {
             jdbcDatabase.setNewCharsetName(EncodeConstants.ENCODING_GBK);
             jdbcDatabase.setOriginalCharsetName(((String) this.charSetComboBox.getSelectedItem()));