Hi, All: I submit a patch, please take a time to review, if have any problem please let me know, Thanks! https://reviews.apache.org/r/43136/diff/1#index_header
[cid:image001.png@01D0E8C5.8D08F440] Bingqiang Pang 00278970 Distributed Software Lab Huawei Technologies Co., Ltd. Email:pangbingqi...@huawei.com<mailto:sut...@huawei.com>
