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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