Uploaded image for project: 'Hadoop YARN'
  1. Hadoop YARN
  2. YARN-7377

Duplicate Containers allocated for Long-Running Application after NM lost and restart and RM restart

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 3.0.0-alpha3
    • Fix Version/s: None
    • Component/s: applications, nodemanager, RM, yarn
    • Labels:
    • Environment:

      RM recovery and NM recovery enabled´╝Ť
      Spark streaming application, a long-running application on yarn

      Description

      Case:
      A Spark streaming application named app1 running on yarn for a long time; app1 has 3 containers in total, one of them named c1 runs on a NM named nm1;

      1. The NM named nm1 was lost for some reason, but the containers on it runs well;

      2. 10 minutes later, RM lost this NM because of no heartbeats received; so RM tells app1's AM that a container of app1 was failed because of NM lost, so app1's AM killed that container through RPC and then request a new container named c2 from RM, which is duplicate to c1;

      3. Administrator found nm1 lost, so he restart it; since NM's recovery was enabled, NM restore all the containers including container c1, but now c1's status is 'DONE';
      A bug here: nm1 will list this container c1 in webui forever;

      4. RM restart for some reason; since RM's recovery was enabled, RM restore all the apps including app1, and all the NM need re-register to RM; However, when nm1 registers to RM, RM found the container c1's status was DONE, so RM tells app1's AM that a container of app1 was complete, since spark streaming application has fixed number of containers, so AM request a new container named c3 from RM, which is duplicate to c1.

      A bug here:
      Now, app1 has 4 containers in total, while c2 and c3 were the same.

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              NeoMatrix rangjiaheng
            • Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated: