Andrew Purtell created HDFS-13933:
-------------------------------------

             Summary: [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


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. 



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