[jira] [Created] (FLINK-15948) Resource will be wasted when the task manager memory is not a multiple of Yarn minimum allocation

[Shang Yuanchun (Jira)]

Yang Wang created FLINK-15948:
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             Summary: Resource will be wasted when the task manager memory is not a multiple of Yarn minimum allocation
                 Key: FLINK-15948
                 URL: https://issues.apache.org/jira/browse/FLINK-15948
             Project: Flink
          Issue Type: Bug
          Components: Deployment / YARN
    Affects Versions: 1.10.0
            Reporter: Yang Wang


If the {{taskmanager.memory.process.size}} is set to 2000m and the Yarn minimum allocation is 128m, we will get a container with 2048m. Currently, {{TaskExecutorProcessSpec}} is built with 2000m, so we will have 48m wasted and they could not be used by Flink.

I think Flink has accounted all the jvm heap, off-heap, overhead resources. So we should not leave these free memory there. And i suggest to update the {{TaskExecutorProcessSpec}} according to the Yarn allocated container.



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