zhihai xu commented on YARN-3943:

The checkstyle issues and release audit warnings for the new patch 
YARN-3943.002.patch were pre-existing.

> Use separate threshold configurations for disk-full detection and 
> disk-not-full detection.
> ------------------------------------------------------------------------------------------
>                 Key: YARN-3943
>                 URL: https://issues.apache.org/jira/browse/YARN-3943
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>            Priority: Critical
>         Attachments: YARN-3943.000.patch, YARN-3943.001.patch, 
> YARN-3943.002.patch
> Use separate threshold configurations to check when disks become full and 
> when disks become good. Currently the configuration 
> "yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage"
>  and "yarn.nodemanager.disk-health-checker.min-free-space-per-disk-mb" are 
> used to check both when disks become full and when disks become good. It will 
> be better to use two configurations: one is used when disks become full from 
> not-full and the other one is used when disks become not-full from full. So 
> we can avoid oscillating frequently.
> For example: we can set the one for disk-full detection higher than the one 
> for disk-not-full detection.

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