diff --git a/.vscode/launch.json b/.vscode/launch.json
index 42668ae..097b04c 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -10,9 +10,18 @@
             "request": "launch",
             "mainClass": "com.yuandian.dataflow.Server",
             "projectName": "dataflow",
+            "console": "integratedTerminal",
             "args": [
                 "0"
             ],
+            "preLaunchTask": "rename",
+            "presentation": {
+                "reveal": "always",
+                "plane": "new",
+                "hidden": false,
+                "group": "",
+                "order": 1
+            }
         },
         {
             "type": "java",
@@ -20,9 +29,17 @@
             "request": "launch",
             "mainClass": "com.yuandian.dataflow.Server",
             "projectName": "dataflow",
+            "console": "integratedTerminal",
             "args": [
                 "1"
             ],
+            "presentation": {
+                "reveal": "always",
+                "plane": "new",
+                "hidden": false,
+                "group": "",
+                "order": 2
+            }
         },
         {
             "type": "java",
@@ -30,29 +47,28 @@
             "request": "launch",
             "mainClass": "com.yuandian.dataflow.Server",
             "projectName": "dataflow",
+            "console": "integratedTerminal",
             "args": [
                 "2"
             ],
+            "presentation": {
+                "reveal": "always",
+                "plane": "new",
+                "hidden": false,
+                "group": "",
+                "order": 3
+            }
         },
-    
-      
-        // {
-        //     "type": "java",
-        //     "name": "Launch Server",
-        //     "request": "launch",
-        //     "mainClass": "com.yuandian.dataflow.Server",
-        //     "projectName": "dataflow",
-        //     "args": [
-        //         "2"
-        //     ],
-        //     "preLaunchTask": "restart",
-        //     "postDebugTask": "stopall"
-        // }
+ 
     ],
+
     "compounds": [
         {
+            
             "name": "Rafts-Server",
-            "configurations": ["Raft-0","Raft-1", "Raft-2"]
+            "configurations": ["Raft-0","Raft-1", "Raft-2"],
+            "preLaunchTask": "clear old data"
         }
     ]
+
 }
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 029d8f2..97231cc 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -18,17 +18,35 @@
             },
         },
         {
-            "label": "stopall",
+            "label": "clear old data",
             "type": "shell",
-            "command": "sh stop.sh",
+            "command": "sh clear_old_data.sh",
             "presentation": {
                 "echo": true,
                 "reveal": "always",
                 "focus": false,
-                "panel": "shared",
-                "close": true
+                "panel": "new",
+                "showReuseMessage": true,
+                "clear": false,
+                "close": false
+                
             },
+        },
+        {
+            "label": "rename",
+            "type": "shell",
+            "command": "ehco ${workbench.action.terminal.rename}",
+            "args": [
+                "123"
+            ]
            
-        }
-    ]
+        },
+
+
+ 
+    ],
+
+  
+ 
+   
 }
\ No newline at end of file
diff --git a/clear_old_data.sh b/clear_old_data.sh
new file mode 100644
index 0000000..ebdeccf
--- /dev/null
+++ b/clear_old_data.sh
@@ -0,0 +1,3 @@
+#! /bin/bash
+rm raftdata/ -rf
+ 
\ No newline at end of file
diff --git a/src/main/java/com/yuandian/dataflow/controller/MasterProcessor.java b/src/main/java/com/yuandian/dataflow/controller/MasterProcessor.java
index 28c4f2e..f865a58 100644
--- a/src/main/java/com/yuandian/dataflow/controller/MasterProcessor.java
+++ b/src/main/java/com/yuandian/dataflow/controller/MasterProcessor.java
@@ -29,6 +29,12 @@ public class MasterProcessor implements MasterExecute {
 
     @Override
     public void loop(MasterContext cxt) {
+        try {
+            Thread.sleep(3000);
+        } catch (InterruptedException e1) {
+            e1.printStackTrace();
+            return;
+        }
 
         var alivePeers = List.copyOf(StateFactory.getRaftNode().listAlivePeers());
         log.debug("master({}) execute {}", StateFactory.getServerId(),