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  1. Sub-task HDFS-2897
    Enable a single 2nn to checkpoint multiple nameservices
  2. Sub-task HDFS-2148
    Address all the federation TODOs
  3. Sub-task HDFS-1791
    Hdfs Federation: Add command to delete block pool directories from a datanode.
  4. Sub-task HDFS-1755
    Hdfs Federation: The BPOfferService must always connect to namenode as the login user.
  5. Sub-task HDFS-1754
    Federation HDFS: testFsck fails
  6. Sub-task HDFS-1749
    Hdfs Federation: TestListCorruptFileBlocks failing in federation branch.
  7. Sub-task HDFS-1747
    HDFS Federation: TestBackupNode Fails on Federation branch
  8. Sub-task HDFS-1746
    Hdfs Federation: TestFileAppend3 fails intermittently.
  9. Sub-task HDFS-1745
    Federation: fix fault injection test build failure
  10. Sub-task HDFS-1744
    Federation: Add new layout version to offline image/edits viewer
  11. Sub-task HDFS-1737
    Federation: Update the layout version for federation changes
  12. Sub-task HDFS-1735
    Federation: merge FSImage changes into FSImage+NNStorage refactoring in trunk
  13. Sub-task HDFS-1722
    HDFS Federation: Add flag to MiniDFSCluster to differentiate between two different modes-Federation and not.
  14. Sub-task HDFS-1721
    Hdfs Federation: Configuration for principal names should not be namenode specific.
  15. Sub-task HDFS-1720
    Federation: FSVolumeSet volumes is not synchronized correctly
  16. Sub-task HDFS-1719
    Federation: TestDFSRemove fails intermittently
  17. Sub-task HDFS-1718
    HDFS Federation: MiniDFSCluster#waitActive() bug causes some tests to fail
  18. Sub-task HDFS-1717
    Federation: FSDataset volumeMap access is not correctly synchronized
  19. Sub-task HDFS-1716
    Federation: Add decommission tests for federated namenodes
  20. Sub-task HDFS-1715
    HDFS Federation: warning/error not generated when datanode sees inconsistent/different Cluster ID between namenodes
  21. Sub-task HDFS-1714
    HDFS Federation: refactor upgrade object in DataNode
  22. Sub-task HDFS-1713
    Hdfs Federation: Prevent DataBlockScanner from running in tight loop
  23. Sub-task HDFS-1712
    HDFS Federation: when looking up datanode we should use machineNmae (in testOverReplicatedBlocks)
  24. Sub-task HDFS-1711
    HDFS Federation: create method for updating machine name in DataNode.java
  25. Sub-task HDFS-1709
    Error "nnaddr url param is null" when clicking on a node from NN Live Node Link
  26. Sub-task HDFS-1708
    Federation: remove datanode's datanodeId TODOs
  27. Sub-task HDFS-1707
    Hdfs Federation: Failure in browsing data on new namenodes
  28. Sub-task HDFS-1706
    Hdfs Federation: TestFileAppend2, TestFileAppend3 and TestBlockTokenWithDFS failing
  29. Sub-task HDFS-1705
    HDFS federation: Balancer command throws NullPointerException
  30. Sub-task HDFS-1704
    Federation: Add a tool that lists namenodes, secondary and backup nodes from the configuration file
  31. Sub-task HDFS-1703
    HDFS federation: Improve start/stop scripts and add script to decommission datanodes
  32. Sub-task HDFS-1702
    HDFS federation : Fix TestBackupNode and TestRefreshNamenodes test failure.
  33. Sub-task HDFS-1701
    HDFS federation :TestHeartbeatHandling fails: wrong number of items in cmds array
  34. Sub-task HDFS-1698
    Hdfs Federation: TestOverReplicatedBlocks and TestWriteReplica failing
  35. Sub-task HDFS-1697
    HDFS federation: fix testBlockRecovery
  36. Sub-task HDFS-1696
    HDFS Federation: when build version doesn't match - datanode should wait (keep connecting) untill NN comes up with the right version
  37. Sub-task HDFS-1695
    HDFS federation: Fix testOIV and TestDatanodeUtils
  38. Sub-task HDFS-1694
    Federation: SimulatedFSDataset changes to work with federation and multiple block pools
  39. Sub-task HDFS-1693
    Federation: TestDFSStorageStateRecovery fails
  40. Sub-task HDFS-1689
    Hdfs Federation: Configuration for namenodes
  41. Sub-task HDFS-1688
    Federation: Fix failures in fault injection tests, TestDiskError, TestDatanodeRestart and TestDFSTartupVersions.
  42. Sub-task HDFS-1686
    Federation: Add more Balancer tests with federation setting
  43. Sub-task HDFS-1684
    Federation: Balancer cannot start with with multiple namenodes.
  44. Sub-task HDFS-1683
    Federation: Test Balancer With Multiple NameNodes
  45. Sub-task HDFS-1682
    Federation: Change Balancer CLI for multiple namenodes and balancing policy
  46. Sub-task HDFS-1681
    Federation: support per pool and per node policies in Balancer
  47. Sub-task HDFS-1680
    Federation: fix TestBalancer
  48. Sub-task HDFS-1678
    HDFS federation: Remove getBlockpool() for NameNodeMXBean in FSNameSystem.
  49. Sub-task HDFS-1677
    HDF federation: Fix TestFsck and TestListCorruptFileBlocks failures
  50. Sub-task HDFS-1674
    HDFS Federation: Rename BlockPool class to BlockPoolSlice
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