HDFS-4179. BackupNode: allow reads, fix checkpointing, safeMode. (shv)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1411508 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of github.com:griddynamics/yhadoop-common into trunk-gd
HADOOP-9042. Add a test for umask in FileSystemContractBaseTest. Contributed by Colin McCabe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1411879 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9072. Hadoop-Common-0.23-Build Fails to build in Jenkins (Robert Parker via tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1411884 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4215. Remove locking from addToParent(..) since it is used in image loading, and add INode.isFile().


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1411947 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9075. FileContext#FSLinkResolver should be made static. Contributed by Arpit Agarwal.

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Merge branch 'trunk' of github.com:griddynamics/yhadoop-common into trunk-gd
HADOOP-9049. DelegationTokenRenewer needs to be Singleton and FileSystems should register/deregister to/from. Contributed by Karthik Kambatla.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1412077 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4216. Do not ignore QuotaExceededException when adding symlinks.


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Merge branch 'trunk' of github.com:griddynamics/yhadoop-common into trunk-gd
MAPREDUCE-4811. JobHistoryServer should show when it was started in WebUI About page. Contributed by Ravi Prakash


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Merge branch 'trunk' of github.com:griddynamics/yhadoop-common into trunk-gd
MAPREDUCE-4764. repair TestBinaryTokenFile (Ivan A. Veselovsky via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1413739 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-8992. Enhance unit-test coverage of class HarFileSystem (Ivan A. Veselovsky via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1413743 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9038. unit-tests for AllocatorPerContext.PathIterator (Ivan A. Veselovsky via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1413776 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4200. Reduce the size of synchronized sections in PacketResponder. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1413826 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9093. Move all the Exception in PathExceptions to o.a.h.fs package. Contributed by Suresh Srinivas.

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Merge branch 'trunk' of github.com:griddynamics/yhadoop-common into trunk-gd
[HADOOP-8849] -- exclude NON-service change from service branch: org.apache.hadoop.fs.FileUtil fullyDelete & fullyDeleteContents methods
Merge branch 'trunk-gd' of https://github.com/griddynamics/yhadoop-common into fb-HADOOP-9067-trunk-gd