diff --git a/iot-machine-state-event-generator-job/src/main/java/com/qniao/iot/machine/event/generator/job/IotMachineEventGeneratorJob.java b/iot-machine-state-event-generator-job/src/main/java/com/qniao/iot/machine/event/generator/job/IotMachineEventGeneratorJob.java
index 3ab10c7..6608f77 100644
--- a/iot-machine-state-event-generator-job/src/main/java/com/qniao/iot/machine/event/generator/job/IotMachineEventGeneratorJob.java
+++ b/iot-machine-state-event-generator-job/src/main/java/com/qniao/iot/machine/event/generator/job/IotMachineEventGeneratorJob.java
@@ -72,6 +72,7 @@ import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.concurrent.locks.ReentrantLock;
 
 @Slf4j
 public class IotMachineEventGeneratorJob {
@@ -100,6 +101,8 @@ public class IotMachineEventGeneratorJob {
             "where qmrs.iot_mac = ?\n" +
             "  and qmrs.is_delete = 0";
 
+    private static final ReentrantLock lock = new ReentrantLock(true);
+
     /**
      * 当前索引日期后缀
      */
@@ -420,6 +423,7 @@ public class IotMachineEventGeneratorJob {
         GetIndexRequest exist = new GetIndexRequest(indicesName);
         // 先判断客户端是否存在
         try {
+            lock.lock();
             boolean exists = restHighLevelClient.indices().exists(exist, RequestOptions.DEFAULT);
             if (!exists) {
                 // 创建索引
@@ -494,6 +498,8 @@ public class IotMachineEventGeneratorJob {
             }
         } catch (Exception e) {
             e.printStackTrace();
+        }finally {
+            lock.unlock();
         }
     }