HDFS-4438. TestDomainSocket fails when system umask is set to 0002. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-347@1438279 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4440. Avoid annoying log message when dfs.domain.socket.path is not set. Contributed by Colin Patrick McCabe.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-347@1438280 13f79535-47bb-0310-9956-ffa450edef68