CLOUDERA-BUILD. Don't put cloudera-jets3t in the reactor in non-dist …

…builds.

HDFS-5433. When reloading fsimage during checkpointing, we should cle…

…ar existing snapshottable directories. Contributed by Aaron T. Myers.

(cherry picked from commit 9777840704ae7d3a4e728e5331e2435ff1a5966d)

Revert "Revert "HADOOP-9150. Avoid unnecessary DNS resolution attempt…

…s for logical URIs. Contributed by Todd Lipcon.""

This reverts commit 99b9786.

Preparing for CDH4.4.0 release

HDFS-4621. Additional logging to help diagnose slow QJM syncs. Contri…

…buted by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1461779 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit c857cf5)

MAPREDUCE-5364. Deadlock between RenewalTimerTask methods cancel() an…

…d run(). (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1499566 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit ce048c0)

MAPREDUCE-5364. Deadlock between RenewalTimerTask methods cancel() an…

…d run(). (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1499566 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit ce048c0)

Preparing for CDH4.1.5 release

Preparing for CDH4.1.5 release

MR1: CLOUDERA-BUILD. Backport fixes from MAPREDUCE-323 to allow under…

…scores in usernames and jobnames

Reason: Customer request
Ref: CDH-11431
Author: Karthik Kambatla
(cherry picked from commit 0fafe10)