diff --git a/pom.xml b/pom.xml
index 87d0823..a091496 100644
--- a/pom.xml
+++ b/pom.xml
@@ -157,8 +157,9 @@
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
                 <version>2.5.4</version>
-
+                
                 <configuration>
+
                     <excludes>
                         <exclude>
                             <groupId>org.projectlombok</groupId>
diff --git a/src/main/java/com/qgs/dc/opcua/controller/OperateController.java b/src/main/java/com/qgs/dc/opcua/controller/OperateController.java
index 3990e15..d47278c 100644
--- a/src/main/java/com/qgs/dc/opcua/controller/OperateController.java
+++ b/src/main/java/com/qgs/dc/opcua/controller/OperateController.java
@@ -69,6 +69,9 @@ public class OperateController {
         List<CurrentSubEntity> currentSubscribeVarForVisited = uaService.getCurrentSubscribeVarForVisited(plcName);
         List<Integer> ns = new ArrayList<>();
         List<String> iden = new ArrayList<>();
+        if(currentSubscribeVarForVisited == null){
+            return;
+        }
         for(CurrentSubEntity currentSubEntity:currentSubscribeVarForVisited){
             ns.add(currentSubEntity.getNameSpace());
             iden.add(currentSubEntity.getIdentifier());
diff --git a/src/main/java/com/qgs/dc/opcua/selfunion/UAService.java b/src/main/java/com/qgs/dc/opcua/selfunion/UAService.java
index 1ebd6a8..3d19ff9 100644
--- a/src/main/java/com/qgs/dc/opcua/selfunion/UAService.java
+++ b/src/main/java/com/qgs/dc/opcua/selfunion/UAService.java
@@ -168,7 +168,6 @@ public class UAService {
         return new ArrayList<>(opcUaClients.keySet());
     }
 
-
     private OpcUaClient createClient(PLCConfig plcConfig) throws Exception {
         //会获取系统的临时目录 可能是linux 或者 是windows
         //Path securityTempDir = Paths.get(System.getProperty("java.io.tmpdir"), "security");
@@ -216,6 +215,7 @@ public class UAService {
             endpoints = DiscoveryClient.getEndpoints(discoveryUrl).get();
         }
 
+
         MessageSecurityMode filterMessageMode = MessageSecurityMode.from(plcConfig.getMessageMode());
 
         EndpointDescription endpoint = endpoints.stream()
@@ -1182,7 +1182,9 @@ public class UAService {
                 users = user_configs.split(",");
             }
             PLCConfig plcConfig = new PLCConfig(plcName, url_config, SecurityPolicy.valueOf(policy_config), users, ip,messageMode);
-            opcUaClients.put(plcName,createClient(plcConfig));
+            OpcUaClient client = createClient(plcConfig);
+
+            opcUaClients.put(plcName,client);
             opcUaClients.get(plcName).connect().get();
 
             //只有当写入无异常的时候在录到本地json文件中去
@@ -1232,8 +1234,11 @@ public class UAService {
             logger.error(err);
 
             //出现异常后把 连接给中断，，然后回收资源
-            opcUaClients.get(plcName).disconnect().get();
-            opcUaClients.remove(plcName);
+            OpcUaClient uaClient = opcUaClients.get(plcName);
+            if(uaClient!=null){
+                opcUaClients.get(plcName).disconnect().get();
+                opcUaClients.remove(plcName);
+            }
             throw e;
         }
     }
diff --git a/src/test/java/com/qgs/dc/DcApplicationTests.java b/src/test/java/com/qgs/dc/DcApplicationTests.java
deleted file mode 100644
index 1e72865..0000000
--- a/src/test/java/com/qgs/dc/DcApplicationTests.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.qgs.dc;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class DcApplicationTests {
-
-    @Test
-    void contextLoads() {
-    }
-
-}