diff --git a/src/main/java/club/joylink/xiannccda/ats/message/collect/datasource/DeviceStatusData.java b/src/main/java/club/joylink/xiannccda/ats/message/collect/datasource/DeviceStatusData.java
index e0f05f4..37fbaee 100644
--- a/src/main/java/club/joylink/xiannccda/ats/message/collect/datasource/DeviceStatusData.java
+++ b/src/main/java/club/joylink/xiannccda/ats/message/collect/datasource/DeviceStatusData.java
@@ -141,6 +141,7 @@ public class DeviceStatusData extends AbstractData {
         b.setIpSingleSwitchStusLocked(false);
         b.setIpSingleSwitchStusCbtcOccupied(false);
         b.setIpSingleSwitchStusCiOccupied(false);
+        b.setIpSingleSwitchStusJammed(false);
       }
     }
   }
diff --git a/src/main/java/club/joylink/xiannccda/ats/warn/BuleDisplayMonitoringTask.java b/src/main/java/club/joylink/xiannccda/ats/warn/BuleDisplayMonitoringTask.java
index 163c225..36d93e8 100644
--- a/src/main/java/club/joylink/xiannccda/ats/warn/BuleDisplayMonitoringTask.java
+++ b/src/main/java/club/joylink/xiannccda/ats/warn/BuleDisplayMonitoringTask.java
@@ -22,6 +22,7 @@ import com.google.protobuf.GeneratedMessageV3;
 import com.google.protobuf.GeneratedMessageV3.Builder;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -61,17 +62,18 @@ public class BuleDisplayMonitoringTask implements AlertMonitoringTask {
   private Map<String, GeneratedMessageV3.Builder> findRtuDeviceSource(String lineIdStr) {
     DeviceStatusData deviceStatusData = DeviceDataRepository.findDataSouce(lineIdStr, DataTypeEnum.DEVICE);
     if (deviceStatusData.getAllDeviceMap().isEmpty()) {
-      return null;
+      return Collections.emptyMap();
     }
     Map<String, GeneratedMessageV3.Builder> builderMap = deviceStatusData.getAllDeviceMap().get(Rtu.getDescriptor().getName());
-    if (builderMap.isEmpty()) {
-      return null;
+    if (CollectionUtils.isEmpty(builderMap)) {
+      return Collections.emptyMap();
     }
     return builderMap;
   }
 
   private List<RtuWarnVO> findRtuBuild(Map<String, GeneratedMessageV3.Builder> builderMap) {
     List<RtuWarnVO> collectRtuList = Lists.newArrayList();
+
     for (Builder value : builderMap.values()) {
       if (value instanceof DeviceStatusProto.Rtu.Builder rtu) {
         Station station = findAllStation(rtu.getLineId(), rtu.getId());