There is no unit test for HftpFileSystem.open(..)
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Key: HDFS-1304
URL: https://issues.apache.org/jira/browse/HDFS-1304
Project: Hadoop HDFS
Issue Type: Improvement
Components: test
Reporter: Tsz Wo (Nicholas), SZE
HftpFileSystem.open(..) first opens an URL connection to namenode's
FileDataServlet and then is redirected to datanode's StreamFile servlet. Such
redirection does not work in the unit test environment because the redirect URL
uses real hostname instead of localhost.
One way to get around it is to use fault-injection in order to replace the real
hostname with localhost.
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