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  1. Hadoop Map/Reduce
  2. MAPREDUCE-6302

Preempt reducers after a configurable timeout irrespective of headroom

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.6.0
    • Fix Version/s: 2.8.0, 2.7.3, 2.6.5, 3.0.0-alpha1
    • Component/s: None
    • Labels:
      None

      Description

      I submit a big job, which has 500 maps and 350 reduce, to a queue(fairscheduler) with 300 max cores. When the big mapreduce job is running 100% maps, the 300 reduces have occupied 300 max cores in the queue. And then, a map fails and retry, waiting for a core, while the 300 reduces are waiting for failed map to finish. So a deadlock occur. As a result, the job is blocked, and the later job in the queue cannot run because no available cores in the queue.
      I think there is the similar issue for memory of a queue .

        Attachments

        1. AM_log_head100000.txt.gz
          830 kB
          mai shurong
        2. AM_log_tail100000.txt.gz
          946 kB
          mai shurong
        3. log.txt
          13 kB
          Benjamin Tortorelli
        4. MAPREDUCE-6302.branch-2.6.0001.patch
          22 kB
          Wangda Tan
        5. MAPREDUCE-6302.branch-2.7.0001.patch
          22 kB
          Wangda Tan
        6. mr-6302_branch-2.patch
          24 kB
          Karthik Kambatla
        7. mr-6302-1.patch
          20 kB
          Karthik Kambatla
        8. mr-6302-2.patch
          22 kB
          Karthik Kambatla
        9. mr-6302-3.patch
          22 kB
          Karthik Kambatla
        10. mr-6302-4.patch
          23 kB
          Karthik Kambatla
        11. mr-6302-5.patch
          23 kB
          Karthik Kambatla
        12. mr-6302-6.patch
          23 kB
          Karthik Kambatla
        13. mr-6302-7.patch
          23 kB
          Karthik Kambatla
        14. mr-6302-prelim.patch
          8 kB
          Karthik Kambatla
        15. queue_with_max163cores.png
          14 kB
          mai shurong
        16. queue_with_max263cores.png
          15 kB
          mai shurong
        17. queue_with_max333cores.png
          13 kB
          mai shurong

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              • Assignee:
                kasha Karthik Kambatla
                Reporter:
                shurong.mai mai shurong
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                Dates

                • Created:
                  Updated:
                  Resolved: