Merged revision(s) 1615504 from hadoop/common/trunk:
HDFS-5185. DN fails to startup if one of the data dir is full. Contributed by Vinayakumar B.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1615505 13f79535-47bb-0310-9956-ffa450edef68