diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
index 99379af0..e4ab58d9 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
@@ -41,14 +41,14 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
         // 补齐tenantId
         Device device1 = deviceService.findByDeviceId(id);
         if(device1 == null || device1.getOpMode() == GnssDevice.OP_MODE_UNUSE) return null;
-        if (logger.isDebugEnabled()) {
-            logger.debug("receive d331 rtcm message of device: "+message.getId()+", seq:"+message.getSeq()+", len:"+message.getLen());
-        }
+        logger.debug("receive d331 rtcm message of device: "+message.getId()+", seq:"+message.getSeq()+", len:"+message.getLen());
+
         // 推送基站数据
         if(device1.getOpMode() == GnssDevice.OP_MODE_USE) {
             byte[] forwardBytes = message.getSrcData();
             // 要求快速转发，因此用缓存，不要每次都查数据库
             List<Device> deviceList = deviceService.findByParentId(id);
+            logger.debug("base station {} has {} rovers: "+message.getId(),deviceList.size());
             for (Device device : deviceList) {
                 if (device.getOpMode() != GnssDevice.OP_MODE_USE) continue;
                 String deviceId = device.getDeviceId();
diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
index f80e8e5d..88dd42de 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
@@ -2,6 +2,8 @@ package com.imdroid.sideslope.sal;
 
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
 
 import javax.annotation.Resource;
@@ -14,13 +16,15 @@ import java.util.concurrent.TimeUnit;
  */
 @Component(value = "local")
 public class LocalDeviceServiceImpl implements DeviceService {
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+
     /*static RemovalListener<String, Device> removalListener = new RemovalListener<String, Device>() {
         public void onRemoval(RemovalNotification<String, Device> removal) {
 
         }
     };*/
     private static final Cache<String, Device> deviceCache = CacheBuilder.newBuilder().
-            expireAfterAccess(90, TimeUnit.MINUTES).build();
+            expireAfterAccess(20, TimeUnit.MINUTES).build();
 
     private static final Cache<String, List<Device>> subDeviceCache = CacheBuilder.newBuilder().
             expireAfterAccess(10, TimeUnit.MINUTES).build();
@@ -44,6 +48,7 @@ public class LocalDeviceServiceImpl implements DeviceService {
     public List<Device> findByParentId(String parentId) {
         List<Device> device = subDeviceCache.getIfPresent(parentId);
         if (device == null) {
+            logger.debug("base station {} refresh: "+parentId);
             device = delegate.findByParentId(parentId);
             if (device != null) {
                 subDeviceCache.put(parentId, device);