YARN-1986. In Fifo Scheduler, node heartbeat in between creating app and attempt causes NPE (Hong Zhiguo via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594476 13f79535-47bb-0310-9956-ffa450edef68
YARN-2042. String shouldn't be compared using == in QueuePlacementRule#NestedUserQueue#getQueueForApp (Chen He via Sandy Ryza)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594482 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5821. Avoid unintentional reallocation of byte arrays in segments
during merge. Contributed by Todd Lipcon


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594654 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'apache/trunk' into archival-archival