diff --git a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileBinaryHandler.java b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileBinaryHandler.java
index 30e3ea60..c62eaa16 100644
--- a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileBinaryHandler.java
+++ b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileBinaryHandler.java
@@ -179,7 +179,7 @@ public class ChargingPileBinaryHandler implements ClientBinaryHandler {
         ChargingStationDto cacheStation = REDIS.getCacheObject("station:".concat(cachePile.get("stationId").toString()));
         cachePile.put("rateModelId", cacheStation.getRateModelId());
         REDIS.setCacheMap(pilekey, cachePile);
-        log.debug("rate model responds success√");
+        log.debug("[{}] rate model[{}] responds success√", pilekey, cacheStation.getRateModelId());
     }
 
     private List<byte[]> parseDataList(byte[] data) {
diff --git a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileServer.java b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileServer.java
index aa2fe3a2..bb45c23d 100644
--- a/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileServer.java
+++ b/xhpc-modules/xhpc-power-pile/src/main/java/com/xhpc/pp/server/ChargingPileServer.java
@@ -112,17 +112,19 @@ public class ChargingPileServer {
     public static void removeHandler(String pileNo) {
 
         ClientHandler handler = handlerMap.remove(pileNo);
-//        handler.closeConnection();
-//        log.debug("handler [{}] for ({}) close connection", handler.getName(), pileNo);
         String pkey = "pile:".concat(pileNo);
         Map<String, Object> cachePile = REDIS.getCacheMap(pkey);
         cachePile.put("status", DISCONNECTED);
         REDIS.setCacheMap(pkey, cachePile);
         putemDisconn(pileNo, cachePile);
-        log.debug("remove handler [{}] for ({}), now try to close conn..", handler.getName(), pileNo);
-        handler.closeConnection();
-        pileMap.remove(handler.getName());
-        versionMapper.remove(handler.getName());
+        if (handler != null) {
+//        handler.closeConnection();
+//        log.debug("handler [{}] for ({}) close connection", handler.getName(), pileNo);
+            log.debug("remove handler [{}] for ({}), now try to close conn..", handler.getName(), pileNo);
+            handler.closeConnection();
+            pileMap.remove(handler.getName());
+            versionMapper.remove(handler.getName());
+        }
     }
 
     public static void sendClientMsg(String pileNo, byte[] msg) {