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  1. Bug HDFS-12930
    Remove the extra space in HdfsImageViewer.md
  2. Improvement YARN-7687
    ContainerLogAppender Improvements
  3. Improvement YARN-7722
    Rename variables in MockNM, MockRM for better clarity
  4. Improvement HADOOP-14849
    some wrong spelling words update
  5. Bug YARN-6878
    TestCapacityScheduler.testDefaultNodeLabelExpressionQueueConfig() has the args to assertEqual() in the wrong order
  6. Improvement HDFS-13202
    Fix the outdated javadocs in HAUtil
  7. Bug YARN-7985
    Service name is validated twice in ServiceClient when a service is created
  8. Bug HDFS-13210
    Fix the typo in MiniDFSCluster class
  9. Improvement HDFS-13167
    DatanodeAdminManager Improvements
  10. Bug HADOOP-15236
    Fix typo in RequestHedgingProxyProvider and RequestHedgingRMFailoverProxyProvider
  11. Improvement HDFS-13193
    Various Improvements for BlockTokenSecretManager
  12. Improvement HDFS-12814
    Add blockId when warning slow mirror/disk in BlockReceiver
  13. Improvement HDFS-12877
    Add open(PathHandle) with default buffersize
  14. Sub-task HDFS-12885
    Add visibility/stability annotations
  15. Sub-task HDFS-12779
    [READ] Allow cluster id to be specified to the Image generation tool
  16. Improvement HDFS-12780
    Fix spelling mistake in DistCpUtils.java
  17. Bug YARN-7452
    Decommissioning node default value to be zero in new YARN UI
  18. Bug HADOOP-15015
    TestConfigurationFieldsBase to use SLF4J for logging
  19. Bug HDFS-13063
    Fix the incorrect spelling in HDFSHighAvailabilityWithQJM.md
  20. Bug HADOOP-15181
    Typo in SecureMode.md
  21. Bug HDFS-13016
    globStatus javadoc refers to glob pattern as "regular expression"
  22. Improvement HDFS-12560
    Remove the extra word "it" in HdfsUserGuide.md
  23. Bug HDFS-12627
    Fix typo in DFSAdmin command output
  24. Task YARN-6499
    Remove the doc about Schedulable#redistributeShare()
  25. Bug YARN-5714
    ContainerExecutor does not order environment map
  26. Bug HDFS-12987
    Document - Disabling the Lazy persist file scrubber.
  27. Bug HADOOP-15152
    Typo in javadoc of ReconfigurableBase#reconfigurePropertyImpl
  28. Sub-task HDFS-1686
    Federation: Add more Balancer tests with federation setting
  29. Improvement HADOOP-12897
    KerberosAuthenticator.authenticate to include URL on IO failures
  30. Sub-task HDFS-13099
    RBF: Use the ZooKeeper as the default State Store
  31. Sub-task HDFS-13049
    RBF: Inconsistent Router OPTS config in branch-2 and branch-3
  32. Improvement YARN-7755
    Clean up deprecation messages for allocation increments in FS config
  33. Improvement HDFS-12933
    Improve logging when DFSStripedOutputStream failed to write some blocks
  34. Bug HADOOP-15123
    KDiag tries to load krb5.conf from KRB5CCNAME instead of KRB5_CONFIG
  35. Improvement HDFS-12932
    Fix confusing LOG message for block replication
  36. Bug MAPREDUCE-7023
    TestHadoopArchiveLogs.testCheckFilesAndSeedApps fails on rerun
  37. Bug HDFS-12963
    Error log level in ShortCircuitRegistry#removeShm
  38. Bug HDFS-12948
    DiskBalancer report command top option should only take positive numeric values
  39. Improvement HDFS-12945
    Switch to ClientProtocol instead of NamenodeProtocols in NamenodeWebHdfsMethods
  40. Bug HDFS-12959
    Fix TestOpenFilesWithSnapshot redundant configurations
  41. Bug YARN-7647
    NM print inappropriate error log when node-labels is enabled
  42. Improvement YARN-7642
    Add test case to verify context update after container promotion or demotion with or without auto update
  43. Bug HADOOP-15109
    TestDFSIO -read -random doesn't work on file sized 4GB
  44. Sub-task YARN-7630
    Fix AMRMToken rollover handling in AMRMProxy
  45. Improvement HADOOP-15106
    FileSystem::open(PathHandle) should throw a specific exception on validation failure
  46. Improvement HADOOP-15168
    Add kdiag tool to hadoop command
  47. Bug HADOOP-15163
    Fix S3ACommitter documentation
  48. Bug HADOOP-15155
    Error in javadoc of ReconfigurableBase#reconfigureProperty
  49. Sub-task MAPREDUCE-7030
    Uploader tool should ignore symlinks to the same directory
  50. Improvement YARN-7688
    Miscellaneous Improvements To ProcfsBasedProcessTree
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