....

examcloud-core-basic-service/src/main/java/cn/com/qmth/examcloud/core/basic/service/cache/SystemPropertyCache.java

@@ -29,7 +29,7 @@ public class SystemPropertyCache extends RandomObjectRedisCache<SysPropertyCache
 
 		SystemPropertyEntity sysConf = systemPropertyRepo.getOne(propKey);
 		if (null == sysConf) {
-			throw new StatusException("350002", "key is wrong");
+			return null;
 		}
 
 		String value = sysConf.getPropValue();