wangyang0918 commented on issue #10089: [FLINK-12342][yarn] Remove container requests in order to reduce excess containers URL: https://github.com/apache/flink/pull/10089#issuecomment-550136405 I have tested the PR in the following cases. Ask 1000 containers with 500ms `containerRequestHeartbeatInterval` * All containers are returned in one heart beat. There is no excess containers. * Containers are returned in two or more heart beats. More than 3000 containers are allocated from yarn. It is based whether the hdfs is busy. Anyway, this PR is useful especially when the yarn cluster has enough resource. I am in favor of merging.
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