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https://issues.apache.org/jira/browse/SPARK-51408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Jie resolved SPARK-51408.
------------------------------
Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 50173
[https://github.com/apache/spark/pull/50173]
> AmIpFilterSuite#testProxyUpdate fails in some networks
> ------------------------------------------------------
>
> Key: SPARK-51408
> URL: https://issues.apache.org/jira/browse/SPARK-51408
> Project: Spark
> Issue Type: Bug
> Components: Tests, YARN
> Affects Versions: 4.0.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> While verifying Spark 4.0.0 RC2, I consistently saw YARN test
> {{AmIpFilterSuite#testProxyUpdate}} failing in my environment. The test is
> written to eventually expect a {{ServletException}} from
> {{getProxyAddresses}} after 5 seconds of retries, but I never received this
> exception.
> This test and the corresponding {{AmIpFilter}} were introduced in SPARK-48238
> as a fork of the Hadoop implementation to resolve a dependency conflict.
> However, it seems this test had a small bug in the way it was adapted into
> the Spark codebase. The {{AmIpFilter#getProxyAddresses()}} logic may either
> return an empty set or throw a {{ServletException}} if it can't find any
> valid configured proxies. The Hadoop test's assertion allows for either of
> these conditions, but the Spark implementation strictly requires an exception
> to be thrown.
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