HADOOP-8973. DiskChecker cannot reliably detect an inaccessible disk on Windows with NTFS ACLs. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1454889 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into HDFS-4287
HADOOP-9379. capture the ulimit info after printing the log to the console. Contributed by Arpit Gupta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1455316 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into HDFS-4287
HDFS-4287: code review feedback
HDFS-4391. TestDataTransferKeepalive fails when tests are executed in a certain order. Contributed by Andrew Wang.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1455343 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into HDFS-4287
HDFS-4572. Fix TestJournal failures on Windows. Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1455360 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4287: switch to using File#isAbsolute
Merge branch 'trunk' into HDFS-4287
HDFS-4287: code review feedback
HDFS-4287: correct a few assertions