Tao Yang created YARN-7461:
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Summary: DominantResourceCalculator#ratio calculation problem when
right resource contains zero value
Key: YARN-7461
URL: https://issues.apache.org/jira/browse/YARN-7461
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 3.0.0-alpha4
Reporter: Tao Yang
Priority: Minor
Currently DominantResourceCalculator#ratio may return wrong result when right
resource contains zero value. For example, there are three resource types such
as <memory-mb, vcores, vssd>, leftResource=<5, 5, 0> and rightResource=<10, 10,
0>, we expect the result of DominantResourceCalculator#ratio(leftResource,
rightResource) is 0.5 but currently is NaN.
There should be a verification before divide calculation to ensure that
dividend is not zero.
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