HDFS-4621. Additional logging to help diagnose slow QJM syncs. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461779 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4618. Default transaction interval for checkpoints is too low. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461784 13f79535-47bb-0310-9956-ffa450edef68
YARN-209. Fix CapacityScheduler to trigger application-activation when the cluster capacity changes. Contributed by Zhijie Shen.
svn merge --ignore-ancestry -c 1461773 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461790 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9358. "Auth failed" log should include exception string. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461794 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9125. LdapGroupsMapping threw CommunicationException after some idle time. Contributed by Kai Zheng.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461864 13f79535-47bb-0310-9956-ffa450edef68
YARN-24. Nodemanager fails to start if log aggregation enabled and namenode unavailable. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461892 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9357. Fallback to default authority if not specified in FileContext. Contributed by Andrew Wang


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461901 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1462271 from trunk to branch-2 for YARN-450. Define value for * in the scheduling protocol (Zhijie Shen via bikas)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1462274 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9150. Avoid unnecessary DNS resolution attempts for logical URIs. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1462301 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9444. Modify hadoop-policy.xml to replace unexpanded variables to a default value of '*'. Contributed by Roman Shaposhnik.
svn merge --ignore-ancestry -c 1462417 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1462418 13f79535-47bb-0310-9956-ffa450edef68
YARN-460. CS user left in list of active users for the queue even when application finished (tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1462500 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1462632 FIXES: YARN-515. Node Manager not getting the master key. Contributed by Robert Joseph Evans


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1462634 13f79535-47bb-0310-9956-ffa450edef68
YARN-475. Remove a unused constant in the public API - ApplicationConstants.AM_APP_ATTEMPT_ID_ENV. Contributed by Hitesh Shah.
svn merge --ignore-ancestry -c 1463033 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463034 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1463221 FIXES: MAPREDUCE-4974. Optimising the LineRecordReader initialize() method (Gelesh via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463222 13f79535-47bb-0310-9956-ffa450edef68
YARN-309. Changed NodeManager to obtain heart-beat interval from the ResourceManager. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1463346 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463347 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4655. DNA_FINALIZE is logged as being an unknown command by the DN when received from the standby NN. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463356 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4656. DN heartbeat loop can be briefly tight. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463358 13f79535-47bb-0310-9956-ffa450edef68
Reverted MAPREDUCE-4974 because of test failures.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463360 13f79535-47bb-0310-9956-ffa450edef68
YARN-516. Fix failure in TestContainerLocalizer caused by HADOOP-9357. Contributed by Andrew Wang.
svn merge --ignore-ancestry -c 1463362 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1463363 13f79535-47bb-0310-9956-ffa450edef68
YARN-447. Move ApplicationComparator in CapacityScheduler to use comparator in ApplicationId. Contributed by Nemon Lou.
svn merge --ignore-ancestry -c 1463405 ../../trunk/


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