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https://issues.apache.org/jira/browse/HDFS-13933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16826978#comment-16826978
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Kitti Nanasi commented on HDFS-13933:
-------------------------------------
The affected tests all use HttpsURLConnection and HttpURLConnection classes
that have a better alternative in JDK 11. We might need to use the new
HttpClient instead. But let's see if we can fix the current implementation
first.
Related article:
[https://dzone.com/articles/java-11-standardized-http-client-api]
> [JDK 11] SWebhdfsFileSystem related tests fail with hostname verification
> problems for "localhost"
> --------------------------------------------------------------------------------------------------
>
> Key: HDFS-13933
> URL: https://issues.apache.org/jira/browse/HDFS-13933
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Reporter: Andrew Purtell
> Priority: Minor
>
> Tests with issues:
> * TestHttpFSFWithSWebhdfsFileSystem
> * TestWebHdfsTokens
> * TestSWebHdfsFileContextMainOperations
> Possibly others. Failure looks like
> {noformat}
> java.io.IOException: localhost:50260: HTTPS hostname wrong: should be
> <localhost>
> {noformat}
> These tests set up a trust store and use HTTPS connections, and with Java 11
> the client validation of the server name in the generated self-signed
> certificate is failing. Exceptions originate in the JRE's HTTP client
> library. How everything hooks together uses static initializers, static
> methods, JUnit MethodRules... There's a lot to unpack, not sure how to fix.
> This is Java 11+28
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