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https://issues.apache.org/jira/browse/FLINK-10848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16693835#comment-16693835
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Shuyi Chen commented on FLINK-10848:
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[~till.rohrmann], can you help take a look at this PR? Thanks a lot.
> 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: 1.3.3, 1.4.2, 1.5.5, 1.6.2
> Reporter: Shuyi Chen
> Assignee: Shuyi Chen
> Priority: Major
> Labels: pull-request-available
>
> 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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