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  1. Hadoop Map/Reduce
  2. MAPREDUCE-3902

MR AM should reuse containers for map tasks, there-by allowing fine-grained control on num-maps for users without need for CombineFileInputFormat etc.

    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: applicationmaster, mrv2
    • Labels:
      None

      Description

      The MR AM is now in a great position to reuse containers across (map) tasks. This is something similar to JVM re-use we had in 0.20.x, but in a significantly better manner:

      1. Consider data-locality when re-using containers
      2. Consider the new shuffle - ensure that reduces fetch output of the whole container at once (i.e. all maps) : MAPREDUCE-4525

        Attachments

        1. AMContainerRefactorNotes.pdf
          58 kB
          Siddharth Seth
        2. AM_ContainerRefactor.pdf
          151 kB
          Siddharth Seth
        3. MAPREDUCE-3902.2.patch
          55 kB
          Tsuyoshi Ozawa
        4. MAPREDUCE-3902.patch
          74 kB
          Arun C Murthy

          Issue Links

          1.
          [MAPREDUCE-3902] TaskHeartbeatHandler should extends HeartbeatHandlerBase Sub-task Resolved Tsuyoshi Ozawa
          2.
          [MAPREDUCE-3902] ScheduledRequests#remove should remove the elements from mapsHostMapping and mapsRackMapping Sub-task Open Tsuyoshi Ozawa
          3.
          [MAPREDUCE-3902] Ensure not to launch container on blacklisted hosts Sub-task Resolved Tsuyoshi Ozawa
          4.
          [MAPREDUCE-3902] Re-create ask list correctly in case of a temporary error in the AM-RM allocate call Sub-task Resolved Siddharth Seth
          5.
          [MAPREDUCE-3902] RMContainerAllocator#scheduleInterval should be configurable Sub-task Resolved Tsuyoshi Ozawa
          6.
          [MAPREDUCE-3902] RMContainerAllocator#assign should be split into functions Sub-task Open Tsuyoshi Ozawa
          7.
          [MAPREDUCE-3902] Re-wire AM Recovery Sub-task Resolved Siddharth Seth
          8.
          [MAPREDUCE-3902] Re-wire LocalContainerAllocator / UberAM Sub-task Resolved Siddharth Seth
          9.
          [MAPREDUCE-3902] Change AMContainerMap to extend AbstractService Sub-task Resolved Tsuyoshi Ozawa
          10.
          [MAPREDUCE-3902] RMContainerAllocator should factor in nodes being blacklisted Sub-task Resolved Siddharth Seth
          11.
          [MAPREDUCE-3902] Disable AM blacklisting if #blacklistedNodes crosses the configured threshold Sub-task Resolved Siddharth Seth
          12.
          [MAPREDUCE-3902] Unit tests for AMContainer Sub-task Open Unassigned
          13.
          [MAPREDUCE-3902] Unit tests for AMNode Sub-task Open Unassigned
          14.
          [MAPREDUCE-3902] Reduce scheduling fixes, factor in MR-4437 Sub-task Resolved Siddharth Seth
          15.
          [MAPREDUCE-3902] Statistics logging in the AM scheduler Sub-task Resolved Siddharth Seth
          16.
          [MAPREDUCE-3902] Fix and re-enable RMContaienrAllocator unit tests Sub-task Resolved Siddharth Seth
          17.
          [MAPREDUCE-3902] Handle the JobFinishedEvent correctly Sub-task Open Siddharth Seth
          18.
          [MAPREDUCE-3902] Container Launch should be independent of o.a.h.m.Task Sub-task Resolved Siddharth Seth
          19.
          [MAPREDUCE-3902] ContainerHeartbeatHandler should be pinged on a getTask call Sub-task Resolved Siddharth Seth
          20.
          [MAPREDUCE-3902] Use the configured shuffle port and application ACLs Sub-task Resolved Siddharth Seth
          21.
          [MAPREDUCE-3902] Handle a successful NM stop request Sub-task Resolved Siddharth Seth
          22.
          [MAPREDUCE-3902] re-enable disabled unit tests in mr-client-app2 module Sub-task Open Siddharth Seth

            Activity

              People

              • Assignee:
                rkannan82 Kannan Rajah
                Reporter:
                acmurthy Arun C Murthy
              • Votes:
                1 Vote for this issue
                Watchers:
                37 Start watching this issue

                Dates

                • Created:
                  Updated: