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 a6c9fd3..f2e96a0 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
@@ -43,6 +43,7 @@ import org.apache.http.impl.client.BasicCredentialsProvider;
 import org.elasticsearch.action.index.IndexRequest;
 import org.elasticsearch.client.Requests;
 import java.io.IOException;
+import java.sql.SQLException;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -75,8 +76,6 @@ public class IotMachineEventGeneratorJob {
                 .fromSource(source, WatermarkStrategy.noWatermarks(), "machineIotDataReceivedEvent Kafka Source");
 
 
-        List<DeviceState> deviceStateList = Db.use().query(SQL, DeviceState.class);
-
         DataStream<MachineIotDataReceivedEvent> machineIotDataReceivedEventDataStream = dataStreamSource
                 .keyBy(MachineIotDataReceivedEvent::getMachineIotMac)
                 .process(new KeyedProcessFunction<Long, MachineIotDataReceivedEvent, MachineIotDataReceivedEvent>() {
@@ -95,7 +94,7 @@ public class IotMachineEventGeneratorJob {
                                                KeyedProcessFunction<Long, MachineIotDataReceivedEvent, MachineIotDataReceivedEvent>.Context ctx,
                                                Collector<MachineIotDataReceivedEvent> out) throws Exception {
 
-                        JSON deviceStateListJson = getDeviceStateListJson(deviceState, deviceStateList);
+                        JSON deviceStateListJson = getDeviceStateListJson(deviceState);
                         assert deviceStateListJson != null;
                         DeviceState lastedDeviceState = deviceStateListJson
                                 .getByPath(StrUtil.toString(event.getMachineIotMac()), DeviceState.class);
@@ -133,7 +132,7 @@ public class IotMachineEventGeneratorJob {
                                                Collector<BaseCommand> out) throws Exception {
 
                         // 获取最新设备状态
-                        JSON deviceStateListJson = getDeviceStateListJson(deviceState, deviceStateList);
+                        JSON deviceStateListJson = getDeviceStateListJson(deviceState);
                         assert deviceStateListJson != null;
                         DeviceState lastedDeviceState = deviceStateListJson
                                 .getByPath(StrUtil.toString(event.getMachineIotMac()), DeviceState.class);
@@ -161,19 +160,19 @@ public class IotMachineEventGeneratorJob {
         env.execute("Kafka Job");
     }
 
-    private static JSON getDeviceStateListJson(ValueState<JSON> deviceState,
-                                               List<DeviceState> deviceStateList) throws IOException {
+    private static JSON getDeviceStateListJson(ValueState<JSON> deviceState) throws IOException, SQLException {
 
         // 获取最新设备状态
         JSON deviceStateListJson = deviceState.value();
         if(deviceStateListJson == null) {
             Map<Long, DeviceState> allMachineMap = new HashMap<>();
+            List<DeviceState> deviceStateList = Db.use().query(SQL, DeviceState.class);
             if (CollUtil.isNotEmpty(deviceStateList)) {
                 allMachineMap = deviceStateList.stream()
                         .collect(Collectors.toMap(DeviceState::getMachineIotMac,
                                 state -> state, (state1, state2) -> state1));
             }
-            deviceState.update(JSONUtil.parse(allMachineMap));
+            deviceState.update(deviceStateListJson = JSONUtil.parse(allMachineMap));
         }
         return deviceStateListJson;
     }