1. Bug YARN-7325
    Remove unused container variable in DockerLinuxContainerRuntime
  2. Bug YARN-7647
    NM print inappropriate error log when node-labels is enabled
  3. Test YARN-5349
    TestWorkPreservingRMRestart#testUAMRecoveryOnRMWorkPreservingRestart fail intermittently
  4. Bug YARN-6618
    TestNMLeveldbStateStoreService#testCompactionCycle can fail if compaction occurs more than once
  5. Bug YARN-6872
    Ensure apps could run given NodeLabels are disabled post RM switchover/restart
  6. Improvement YARN-6930
    Admins should be able to explicitly enable specific LinuxContainerRuntime in the NodeManager
  7. Bug YARN-6719
    Fix findbugs warnings in SLSCapacityScheduler.java
  8. Bug YARN-6797
    TimelineWriter does not fully consume the POST response
  9. Improvement YARN-7975
    Add an optional arg to yarn cluster -list-node-labels to list nodes collection partitioned by labels
  10. Bug YARN-6536
    TestAMRMClient.testAMRMClientWithSaslEncryption fails intermittently
  11. Sub-task YARN-6679
    Reduce Resource instance overhead via non-PBImpl
  12. Sub-task YARN-6681
    Eliminate double-copy of child queues in canAssignToThisQueue
  13. Sub-task YARN-6680
    Avoid locking overhead for NO_LABEL lookups
  14. Sub-task YARN-6682
    Improve performance of AssignmentInformation datastructures
  15. Bug YARN-7112
    TestAMRMProxy is failing with invalid request
  16. Bug YARN-7122
    TestReservationSystemInvariants and TestSLSRunner fail
  17. Bug YARN-7116
    CapacityScheduler Web UI: Queue's AM usage is always show on per-user's AM usage.
  18. Bug YARN-7048
    Fix tests faking kerberos to explicitly set ugi auth type
  19. Improvement YARN-7037
    Optimize data transfer with zero-copy approach for containerlogs REST API in NMWebServices
  20. Bug YARN-5195
    RM intermittently crashed with NPE while handling APP_ATTEMPT_REMOVED event when async-scheduling enabled in CapacityScheduler
  21. Bug YARN-6805
    NPE in LinuxContainerExecutor due to null PrivilegedOperationException exit code
  22. Bug YARN-6890
    If UI is not secured, we allow user to kill other users' job even yarn cluster is secured.
  23. Bug YARN-6846
    Nodemanager can fail to fully delete application local directories when applications are killed
  24. Bug YARN-6054
    TimelineServer fails to start when some LevelDb state files are missing.
  25. Bug YARN-7083
    Log aggregation deletes/renames while file is open
  26. Bug YARN-7052
    RM SchedulingMonitor gives no indication why the spawned thread crashed.
  27. Bug YARN-7051
    Avoid concurrent modification exception in FifoIntraQueuePreemptionPlugin
  28. Bug YARN-7333
    container-executor fails to remove entries from a directory that is not writable or executable
  29. Bug YARN-7230
    Document DockerContainerRuntime for branch-2.8 with proper scope and claim as an experimental feature
  30. Bug YARN-7249
    Fix CapacityScheduler NPE issue when a container preempted while the node is being removed
  31. Bug YARN-7034
    DefaultLinuxContainerRuntime and DockerLinuxContainerRuntime sends client environment variables to container-executor
  32. Bug YARN-7246
    Fix the default docker binary path
  33. Bug YARN-7087
    NM failed to perform log aggregation due to absent container
  34. Bug YARN-7076
    yarn application -list -appTypes <appType> is not working
  35. Bug YARN-6628
    Unexpected jackson-core-2.2.3 dependency introduced
  36. Bug YARN-6654
    RollingLevelDBTimelineStore backwards incompatible after fst upgrade
  37. Bug YARN-6585
    RM fails to start when upgrading from 2.7 to 2.8 for clusters with node labels.
  38. Bug YARN-6640
    AM heartbeat stuck when responseId overflows MAX_INT
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