HDFS-5170. BlockPlacementPolicyDefault uses the wrong classname when alerting to enable debug logging. (Andrew Wang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1520961 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5414. TestTaskAttempt fails in JDK7 with NPE. Contributed by Nemon Lou.



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1520964 13f79535-47bb-0310-9956-ffa450edef68
YARN-1049. ContainerExistStatus should define a status for preempted containers. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1521036 13f79535-47bb-0310-9956-ffa450edef68
YARN-1144. Unmanaged AMs registering a tracking URI should not be proxy-fied. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1521039 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch: upstream/trunk