HADOOP-9352. Expose UGI.setLoginUser for tests (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452338 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5043. Fetch failure processing can cause AM event queue to backup and eventually OOM (Jason Lowe via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452372 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4128. 2NN gets stuck in inconsistent state if edit log replay fails in the middle (kihwal via daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452384 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
HDFS-4532. RPC call queue may fill due to current user lookup (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452435 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4541. Set hadoop.log.dir and hadoop.id.str when starting secure datanode to write the logs to right dir by default. Contributed by Arpit Gupta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452461 13f79535-47bb-0310-9956-ffa450edef68
YARN-448. Remove unnecessary hflush from log aggregation (Kihwal Lee via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452475 13f79535-47bb-0310-9956-ffa450edef68
YARN-345. Many InvalidStateTransitonException errors for ApplicationImpl in Node Manager. Contributed by Robert Parker


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452548 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9163 The rpc msg in ProtobufRpcEngine.proto should be moved out to avoid an extra copy (Sanjay Radia)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452581 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9337. org.apache.hadoop.fs.DF.getMount() does not work on Mac OS. Contributed by Ivan A. Veselovsky.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1452622 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge branch 'trunk-gd' of https://github.com/griddynamics/yhadoop-common into fb-HADOOP-9166-trunk-gd

Conflicts:
	hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestUserGroupInformation.java