[jira] [Created] (YARN-7270) Resource#getVirtualCores() does unsafe casting from long to int.

["Yufei Gu (JIRA)" <ji...@apache.org>]

Yufei Gu created YARN-7270:
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             Summary: Resource#getVirtualCores() does unsafe casting from long to int.
                 Key: YARN-7270
                 URL: https://issues.apache.org/jira/browse/YARN-7270
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 3.1.0
            Reporter: Yufei Gu
            Assignee: Yufei Gu


Class {{Resource}} has three sub classes(FixedValueResource, LightWeightResource, and ResourcePBImpl). Only FixedValueResource handle long-to-int casting nicely. The other two didn't. This cause several unit test failures. Like this one:
{code}
Error Message

expected:<<memory:4096, vCores:4>> but was:<<memory:4096, vCores:-1>>
Stacktrace

java.lang.AssertionError: expected:<<memory:4096, vCores:4>> but was:<<memory:4096, vCores:-1>>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:118)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFSAppAttempt.testHeadroomWithBlackListedNodes(TestFSAppAttempt.java:325)
{code}



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