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  1. Sub-task HDFS-16283
    RBF: improve renewLease() to call only a specific NameNode rather than make fan-out calls
  2. Sub-task HDFS-16276
    RBF: Remove the useless configuration of rpc isolation in md
  3. Sub-task HDFS-15885
    RBF: Data loss when Router setup connection timeout
  4. Sub-task HDFS-15836
    RBF: Fix contract tests after HADOOP-13327
  5. Sub-task HDFS-15723
    RBF: invokeConcurrent may run unexpected when enable standby read
  6. Sub-task HDFS-15630
    RBF: Fix wrong client IP info in CallerContext when requests mount points with multi-destinations.
  7. Sub-task HDFS-15620
    RBF: Fix test failures after HADOOP-17281
  8. Sub-task HDFS-15613
    RBF: Router FSCK fails after HDFS-14442
  9. Sub-task HDFS-15575
    RBF: Create test cases that simulate general exceptions on NameNodes
  10. Sub-task HDFS-15555
    RBF: Refresh cacheNS when SocketException occurs
  11. Sub-task HDFS-15417
    RBF: Get the datanode report from cache for federation WebHDFS operations
  12. Sub-task HDFS-15173
    RBF: Delete repeated configuration 'dfs.federation.router.metrics.enable'
  13. Sub-task HDFS-15169
    RBF: Router FSCK should consider the mount table
  14. Sub-task HDFS-15109
    RBF: Plugin interface to enable delegation of Router
  15. Sub-task HDFS-15100
    RBF: Print stacktrace when DFSRouter fails to fetch/parse JMX output from NameNode
  16. Sub-task HDFS-15088
    RBF: Correct annotation typo of RouterPermissionChecker#checkPermission
  17. Sub-task HDFS-15082
    RBF: Check each component length of destination path when add/update mount entry
  18. Sub-task HDFS-15079
    RBF: Client maybe get an unexpected result with network anomaly
  19. Sub-task HDFS-15053
    RBF: Add permission check for safemode operation
  20. Sub-task HDFS-15051
    RBF: Impose directory level permissions for Mount entries
  21. Sub-task HDFS-15043
    RBF: The detail of the Exception is not shown in ZKDelegationTokenSecretManagerImpl
  22. Sub-task HDFS-15021
    RBF: Delegation Token can't remove correctly in absence of cancelToken and restart the router.
  23. Sub-task HDFS-14983
    RBF: Add dfsrouteradmin -refreshSuperUserGroupsConfiguration command option
  24. Sub-task HDFS-14902
    RBF: NullPointer When Misconfigured
  25. Sub-task HDFS-14891
    RBF: namenode links in NameFederation Health page (federationhealth.html) cannot use https scheme
  26. Sub-task HDFS-14833
    RBF: Router Update Doesn't Sync Quota
  27. Sub-task HDFS-14811
    RBF: TestRouterRpc#testErasureCoding is flaky
  28. Sub-task HDFS-14766
    RBF: MountTableStoreImpl#getMountTableEntries returns extra entry
  29. Sub-task HDFS-14756
    RBF: getQuotaUsage may ignore some folders
  30. Sub-task HDFS-14749
    RBF: Isolation across multiple downstream hdfs clusters
  31. Sub-task HDFS-14744
    RBF: Non secured routers should not log in error mode when UGI is default.
  32. Sub-task HDFS-14742
    RBF:TestRouterFaultTolerant tests are flaky
  33. Sub-task HDFS-14715
    RBF: Fix RBF failed tests
  34. Sub-task HDFS-14714
    RBF: implement getReplicatedBlockStats interface
  35. Sub-task HDFS-14713
    RBF: RouterAdmin supports refreshRouterArgs command but not on display
  36. Sub-task HDFS-14711
    RBF: RBFMetrics throws NullPointerException if stateStore disabled
  37. Sub-task HDFS-14704
    RBF: ServiceAddress and webAddress should not be null in NamenodeHeartbeatService
  38. Sub-task HDFS-14670
    RBF: Create secret manager instance using FederationUtil#newInstance.
  39. Sub-task HDFS-14656
    RBF: NPE in RBFMetrics
  40. Sub-task HDFS-14654
    RBF: TestRouterRpc#testNamenodeMetrics is flaky
  41. Sub-task HDFS-14653
    RBF: Correct the default value for dfs.federation.router.namenode.heartbeat.enable
  42. Sub-task HDFS-14620
    RBF: Fix 'not a super user' error when disabling a namespace in kerberos with superuser principal
  43. Sub-task HDFS-14593
    RBF: Implement deletion feature for expired records in State Store
  44. Sub-task HDFS-14577
    RBF: FederationUtil#newInstance should allow constructor without context
  45. Sub-task HDFS-14558
    RBF: Isolation/Fairness documentation
  46. Sub-task HDFS-14495
    RBF: Duplicate FederationRPCMetrics
  47. Sub-task HDFS-14461
    RBF: Fix intermittently failing kerberos related unit test
  48. Sub-task HDFS-14431
    RBF: Rename with multiple subclusters should fail if no eligible locations
  49. Sub-task HDFS-14430
    RBF: Fix MockNamenode bug about mocking RPC getListing and mkdir
  50. Sub-task HDFS-14427
    RBF: Optimize some testing set up logic in MiniRouterDFSCluster
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