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From "Hrishikesh Gadre (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-15758) Filesystem.get(URI, Configuration, user) API not working with proxy users
Date Mon, 17 Sep 2018 18:08:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hrishikesh Gadre updated HADOOP-15758:
    Attachment: HADOOP-15758-001.patch

> Filesystem.get(URI, Configuration, user) API not working with proxy users
> -------------------------------------------------------------------------
>                 Key: HADOOP-15758
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15758
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.6.0, 3.0.0
>            Reporter: Hrishikesh Gadre
>            Assignee: Hrishikesh Gadre
>            Priority: Major
>         Attachments: HADOOP-15758-001.patch
> 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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