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[jira] [Created] (FLINK-10848) Flink's Yarn ResourceManager can allocate too many excess containers


Shuyi Chen created FLINK-10848:
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             Summary: Flink's Yarn ResourceManager can allocate too many excess containers
                 Key: FLINK-10848
                 URL: https://issues.apache.org/jira/browse/FLINK-10848
             Project: Flink
          Issue Type: Bug
          Components: YARN
    Affects Versions: 1.6.2, 1.5.5, 1.4.2, 1.3.3
            Reporter: Shuyi Chen
            Assignee: Shuyi Chen


Currently, both the YarnFlinkResourceManager and YarnResourceManager do not call removeContainerRequest() on container allocation success. Because the YARN AM-RM protocol is not a delta protocol (please see YARN-1902), AMRMClient will keep all ContainerRequests that are added and send them to RM.

In production, we observe the following that verifies the theory: 16 containers are allocated and used upon cluster startup; when a TM is killed, 17 containers are allocated, 1 container is used, and 16 excess containers are returned; when another TM is killed, 18 containers are allocated, 1 container is used, and 17 excess containers are returned.



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