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  1. Bug MAPREDUCE-4742
    Fix typo in nnbench#displayUsage
  2. Bug MAPREDUCE-6294
    Remove an extra parameter described in Javadoc of TockenCache
  3. Bug MAPREDUCE-6389
    Fix BaileyBorweinPlouffe CLI usage message
  4. Bug MAPREDUCE-6341
    Fix typo in mapreduce tutorial
  5. Bug MAPREDUCE-6610
    JobHistoryEventHandler should not swallow timeline response
  6. Bug MAPREDUCE-6563
    Streaming documentation contains a stray '%' character.
  7. Improvement MAPREDUCE-5755
    MapTask.MapOutputBuffer#compare/swap should have @Override annotation
  8. Bug MAPREDUCE-6281
    Fix javadoc in Terasort
  9. Bug MAPREDUCE-6300
    Task list sort by task id broken
  10. Improvement MAPREDUCE-6297
    Task Id of the failed task in diagnostics should link to the task page
  11. Test MAPREDUCE-6204
    TestJobCounters should use new properties instead of JobConf.MAPRED_TASK_JAVA_OPTS
  12. Task MAPREDUCE-6388
    Remove deprecation warnings from JobHistoryServer classes
  13. Bug MAPREDUCE-6349
    Fix typo in property org.apache.hadoop.mapreduce.lib.chain.Chain.REDUCER_INPUT_VALUE_CLASS
  14. Improvement MAPREDUCE-6307
    Remove property mapreduce.tasktracker.taskmemorymanager.monitoringinterval
  15. Improvement MAPREDUCE-6462
    JobHistoryServer to support JvmPauseMonitor as a service
  16. Test MAPREDUCE-6614
    Remove unnecessary code in TestMapreduceConfigFields
  17. Improvement MAPREDUCE-5762
    Port MAPREDUCE-3223 and MAPREDUCE-4695 (Remove MRv1 config from mapred-default.xml) to branch-2
  18. Bug MAPREDUCE-5883
    "Total megabyte-seconds" in job counters is slightly misleading
  19. Bug MAPREDUCE-5748
    Potential null pointer dereference in ShuffleHandler#Shuffle#messageReceived()
  20. Bug MAPREDUCE-6165
    [JDK8] TestCombineFileInputFormat failed on JDK8
  21. New Feature MAPREDUCE-6284
    Add Task Attempt State API to MapReduce Application Master REST API
  22. Bug MAPREDUCE-6273
    HistoryFileManager should check whether summaryFile exists to avoid FileNotFoundException causing HistoryFileInfo into MOVE_FAILED state
  23. Bug MAPREDUCE-5905
    CountersStrings.toEscapedCompactStrings outputs unnecessary "null" strings
  24. Bug MAPREDUCE-5708
    Duplicate String.format in YarnOutputFiles.getSpillFileForWrite
  25. Bug MAPREDUCE-6356
    Misspelling of threshold in log4j.properties for tests
  26. Bug MAPREDUCE-6330
    Fix typo in Task Attempt API's URL in documentations
  27. Bug MAPREDUCE-6553
    Replace '\u2b05' with '<-' in rendering job configuration
  28. Bug MAPREDUCE-6740
    Enforce mapreduce.task.timeout to be at least mapreduce.task.progress-report.interval
  29. Sub-task MAPREDUCE-5400
    MRAppMaster throws InvalidStateTransitonException: Invalid event: JOB_TASK_COMPLETED at SUCCEEDED for JobImpl
  30. Improvement MAPREDUCE-5044
    Have AM trigger jstack on task attempts that timeout before killing them
  31. Bug MAPREDUCE-4750
    Enable NNBenchWithoutMR in MapredTestDriver
  32. Bug MAPREDUCE-6252
    JobHistoryServer should not fail when encountering a missing directory
  33. Bug MAPREDUCE-6251
    JobClient needs additional retries at a higher level to address not-immediately-consistent dfs corner cases
  34. New Feature MAPREDUCE-6304
    Specifying node labels when submitting MR jobs
  35. Bug MAPREDUCE-6242
    Progress report log is incredibly excessive in application master
  36. Improvement MAPREDUCE-5232
    log classpath and other key properties on child JVM start
  37. Bug MAPREDUCE-6301
    Task UI, sort by name doesn't work
  38. Bug MAPREDUCE-3383
    Duplicate job.getOutputValueGroupingComparator() in ReduceTask
  39. Task MAPREDUCE-6483
    Replace deprecated method NameNode.getUri() with DFSUtilClient.getNNUri() in TestMRCredentials
  40. Bug MAPREDUCE-6382
    Don't escape HTML links in Diagnostics in JHS job overview
  41. Improvement MAPREDUCE-6383
    Pi job (QuasiMonteCarlo) should not try to read the results file if its job fails
  42. Bug MAPREDUCE-6419
    JobHistoryServer doesn't sort properly based on Job ID when Job id's exceed 9999
  43. New Feature MAPREDUCE-6415
    Create a tool to combine aggregated logs into HAR files
  44. Bug MAPREDUCE-6421
    Fix findbugs warning in RMContainerAllocator.reduceNodeLabelExpression
  45. Improvement MAPREDUCE-6395
    Improve the commit failure messages in MRAppMaster recovery
  46. Bug MAPREDUCE-6633
    AM should retry map attempts if the reduce task encounters commpression related errors.
  47. Bug MAPREDUCE-6619
    HADOOP_CLASSPATH is overwritten in MR container
  48. Improvement MAPREDUCE-6354
    ShuffleHandler should be able to log shuffle connections
  49. Bug MAPREDUCE-6360
    TestMapreduceConfigFields is placed in wrong dir, introducing compile error
  50. Improvement MAPREDUCE-6443
    Add JvmPauseMonitor to Job History Server
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