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  1. Sub-task HDFS-4809
    Add more unit tests for the undo section of rename
  2. Sub-task HDFS-4806
    For an INodeDirectoryWithSnapshot, use INode#isInLatestSnapshot() to check if the added/removed child should be recorded in snapshot diff
  3. Sub-task HDFS-4802
    Disallowing snapshot on / twice throws error
  4. Sub-task HDFS-4801
    lsSnapshottableDir throws IllegalArgumentException when root is made snapshottable
  5. Sub-task HDFS-4800
    Fix INodeDirectoryWithSnapshot#cleanDeletedINode
  6. Sub-task HDFS-4798
    Update computeContentSummary() for the reference nodes in snapshots
  7. Sub-task HDFS-4791
    Update and fix deletion of reference inode
  8. Sub-task HDFS-4781
    File listing of .snapshot under a non-existing dir throws NullPointer
  9. Sub-task HDFS-4773
    Fix bugs in quota usage updating/computation
  10. Sub-task HDFS-4767
    directory is not snapshottable after clrQuota
  11. Sub-task HDFS-4760
    Update inodeMap after node replacement
  12. Sub-task HDFS-4759
    snapshotDiff of two invalid snapshots but with same name returns success
  13. Sub-task HDFS-4758
    Disallow nested snapshottable directories
  14. Sub-task HDFS-4755
    AccessControlException message is changed in snapshot branch
  15. Sub-task HDFS-4749
    Use INodeId to identify the corresponding directory node for FSImage saving/loading
  16. Sub-task HDFS-4742
    Fix appending to a renamed file with snapshot
  17. Sub-task HDFS-4738
    Fix javadoc and other warnings in the snapshot branch
  18. Sub-task HDFS-4735
    DisallowSnapshot throws IllegalStateException
  19. Sub-task HDFS-4729
    Fix OfflineImageViewer and permission checking for snapshot operations
  20. Sub-task HDFS-4728
    Snapshot tests broken after merge from trunk
  21. Sub-task HDFS-4727
    Update inodeMap after deleting files/directories/snapshots
  22. Sub-task HDFS-4726
    Fix test failures after merging the mapping from INodeId to INode
  23. Sub-task HDFS-4719
    Minor simplifications to snapshot code
  24. Sub-task HDFS-4717
    Change the parameter type of the snapshot methods in HdfsAdmin to Path
  25. Sub-task HDFS-4708
    Add snapshot user guide
  26. Sub-task HDFS-4707
    Fix FilterFileSystem and findbugs warning in Snapshot branch
  27. Sub-task HDFS-4706
    disallowSnapshot does not work for root
  28. Sub-task HDFS-4700
    Fix the undo section of rename with snapshots
  29. Sub-task HDFS-4692
    Use timestamp as the default snapshot name
  30. Sub-task HDFS-4686
    Fix quota computation for rename with snapshots
  31. Sub-task HDFS-4684
    Snapshot: Use INode id for image serialization
  32. Sub-task HDFS-4675
    Fix rename across snapshottable directories
  33. Sub-task HDFS-4673
    Renaming file in subdirectory of a snapshotted directory does not work.
  34. Sub-task HDFS-4666
    Disallow users to create file/dir named ".snapshot"
  35. Sub-task HDFS-4650
    Add rename test in TestSnapshot
  36. Sub-task HDFS-4648
    For snapshot deletion, when merging the diff from to-delete snapshot to the prior snapshot, make sure files/directories created after the prior snapshot get deleted
  37. Sub-task HDFS-4647
    llegalStateException renaming file under snapshottable directory
  38. Sub-task HDFS-4637
    INodeDirectory#replaceSelf4Quota may convert a newly created directory (which is not included in the latest snapshot) to an INodeDirectoryWithSnapshot
  39. Sub-task HDFS-4636
    Update quota usage when deleting files/dirs that were created after taking the latest snapshot
  40. Sub-task HDFS-4627
    Fix FSImageFormat#Loader NPE and synchronization issues
  41. Sub-task HDFS-4616
    Update the FilesDeleted metric while deleting file/dir in the current tree
  42. Sub-task HDFS-4612
    Not to use INode.getParent() when generating snapshot diff report
  43. Sub-task HDFS-4611
    Snapshot: Update FSImage for INodeReference
  44. Sub-task HDFS-4579
    Annotate snapshot tests
  45. Sub-task HDFS-4578
    Restrict snapshot IDs to 24-bits wide
  46. Sub-task HDFS-4574
    Move Diff and EnumCounters to util package
  47. Sub-task HDFS-4563
    Update namespace/diskspace after deleting snapshots
  48. Sub-task HDFS-4557
    Fix FSDirectory#delete when INode#cleanSubtree returns 0
  49. Sub-task HDFS-4556
    Add snapshotdiff and LsSnapshottableDir tools to hdfs script
  50. Sub-task HDFS-4550
    Refactor INodesInPath to a standalone class
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