系统繁忙修复

mec-biz/src/main/java/com/ym/mec/biz/service/impl/SysMessageServiceImpl.java

@@ -176,6 +176,9 @@ public class SysMessageServiceImpl extends BaseServiceImpl<Long, SysMessage> imp
 
 	@Override
 	public boolean batchSeoMessage(Set<Integer> userIds, MessageTypeEnum messageType,String memo, Object... args) {
+		if(userIds != null){
+			userIds.removeAll(Collections.singleton(null));
+		}
 		if (userIds == null || userIds.size() == 0) {
 			throw new BizException("接收地址不能为空");
 		}