Hrishikesh Gadre created HADOOP-15758:
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Summary: Filesystem.get API not working as expected with user
argument
Key: HADOOP-15758
URL: https://issues.apache.org/jira/browse/HADOOP-15758
Project: Hadoop Common
Issue Type: Bug
Reporter: Hrishikesh Gadre
A user reported that the Filesystem.get API is not working as expected when
they use the 'FileSystem.get(URI, Configuration, user)' method signature - but
'FileSystem.get(URI, Configuration)' works fine. The user is trying to use this
method signature to mimic proxy user functionality e.g. provide ticket cache
based kerberos credentials (using KRB5CCNAME env variable) for the proxy user
and then in the java program pass name of the user to be impersonated. The
alternative, to use [proxy users
functionality|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Superusers.html]
in Hadoop works as expected.
Since FileSystem.get(URI, Configuration, user) is a public API and it does not
restrict its usage in this fashion, we should ideally make it work or add docs
to discourage its usage to implement proxy users.
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