fix alert server client send. (#4587)

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/runner/AlertSender.java

@@ -106,8 +106,8 @@ public class AlertSender {
 
         List<AlertPluginInstance> alertInstanceList = alertDao.listInstanceByAlertGroupId(alertGroupId);
         AlertData alertData = new AlertData();
-        alertData.setContent(title)
-            .setTitle(content);
+        alertData.setContent(content)
+            .setTitle(title);
 
         boolean sendResponseStatus = true;
         List<AlertSendResponseResult> sendResponseResults = new ArrayList<>();

dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/worker/WorkerServer.java

@@ -103,11 +103,14 @@ public class WorkerServer {
     public void run() {
         logger.info("start worker server...");
 
+        //alert-server client registry
+        alertClientService = new AlertClientService(workerConfig.getAlertListenHost(),Constants.ALERT_RPC_PORT);
+
         //init remoting server
         NettyServerConfig serverConfig = new NettyServerConfig();
         serverConfig.setListenPort(workerConfig.getListenPort());
         this.nettyRemotingServer = new NettyRemotingServer(serverConfig);
-        this.nettyRemotingServer.registerProcessor(CommandType.TASK_EXECUTE_REQUEST, new TaskExecuteProcessor());
+        this.nettyRemotingServer.registerProcessor(CommandType.TASK_EXECUTE_REQUEST, new TaskExecuteProcessor(alertClientService));
         this.nettyRemotingServer.registerProcessor(CommandType.TASK_KILL_REQUEST, new TaskKillProcessor());
         this.nettyRemotingServer.registerProcessor(CommandType.DB_TASK_ACK, new DBTaskAckProcessor());
         this.nettyRemotingServer.registerProcessor(CommandType.DB_TASK_RESPONSE, new DBTaskResponseProcessor());
@@ -116,9 +119,6 @@ public class WorkerServer {
         // worker registry
         this.workerRegistry.registry();
 
-        //alert-server client registry
-        alertClientService = new AlertClientService(workerConfig.getAlertListenHost(),Constants.ALERT_RPC_PORT);
-
         // retry report task status
         this.retryReportTaskStatusThread.start();