Chris Nauroth created YARN-11790:
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             Summary: TestAmFilter#testProxyUpdate fails in some networks
                 Key: YARN-11790
                 URL: https://issues.apache.org/jira/browse/YARN-11790
             Project: Hadoop YARN
          Issue Type: Test
          Components: test, webproxy
    Affects Versions: 3.4.1
            Reporter: Chris Nauroth
            Assignee: Chris Nauroth


While working on SPARK-51408, I discovered an issue that can cause their 
{{AmIpFilterSuite#testProxyUpdate}} to fail in certain unusual network setups. 
This test is a fork of a YARN test from Hadoop. As part of the solution, I 
included some additional randomization on a fake host name intended to simulate 
an unresolvable host. I'd like to bring the same change back into the original 
YARN test to make sure this doesn't become a problem in Hadoop test runs and we 
keep the code in sync.



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