diff --git a/web/src/main/java/com/leaper/web/lib/CameraConnMap.java b/web/src/main/java/com/leaper/web/lib/CameraConnMap.java
index edb5fdb..2a6f722 100644
--- a/web/src/main/java/com/leaper/web/lib/CameraConnMap.java
+++ b/web/src/main/java/com/leaper/web/lib/CameraConnMap.java
@@ -35,7 +35,9 @@ public class CameraConnMap {
         synchronized (cameraId.toString().intern()){
             NetSDKLib.LLong lLong = cameraMap.get(cameraId);
             cameraMap.remove(cameraId);
-            loginMap.remove(lLong);
+            if(lLong!=null){
+                loginMap.remove(lLong);
+            }
         }
     }