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https://issues.apache.org/jira/browse/HDFS-15691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17237118#comment-17237118
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Xiaoqiao He commented on HDFS-15691:
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[~lzx404243], Try to check how to set system property in TestServerWebApp, both
of them act for themselves. Not get why it could cause other ut fail.
> Fix flaky test TestServerWebApp.getHomeDir
> ------------------------------------------
>
> Key: HDFS-15691
> URL: https://issues.apache.org/jira/browse/HDFS-15691
> Project: Hadoop HDFS
> Issue Type: Bug
> Environment: macOS 10.15.6
> java version "1.8.0_151"
> Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
> Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
> Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
>
> Reporter: Zhengxi Li
> Assignee: Zhengxi Li
> Priority: Minor
> Labels: pull-request-available
> Attachments: HDFS-15691.001.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The test '{{org.apache.hadoop.lib.servlet.TestServerWebApp.getHomeDir'}} is
> not idempotent and fails if run twice in the same JVM, because it pollutes
> state shared among tests. It may be good to clean this state pollution so
> that some other tests do not fail in the future due to the shared state
> polluted by this test.
>
> PR link: https://github.com/apache/hadoop/pull/2482
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