I see a new contributor, Yang Yun, posting a number of patches to the Apache JIRA. https://issues.apache.org/jira/issues/?jql=resolution%20%3D%20Unresolved%20AND%20assignee%20%3D%20hadoop_yangyun%20AND%20project%20%3D%2012310942
Some of them look pretty good. Yesterday evening at the community sync call someone said he's from the Xiaomi team. Can use some help getting the patches committed. Thanks, Weichiu
