FAQ
UserGroupInformation.getCurrentUser() fails when called from non-Hadoop JAAS context
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Key: HADOOP-7101
URL: https://issues.apache.org/jira/browse/HADOOP-7101
Project: Hadoop Common
Issue Type: Bug
Components: security
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker
Fix For: 0.22.0


If a Hadoop client is run from inside a container like Tomcat, and the current AccessControlContext has a Subject associated with it that is not created by Hadoop, then UserGroupInformation.getCurrentUser() will throw NoSuchElementException, since it assumes that any Subject will have a hadoop User principal.

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postedJan 12, '11 at 2:27a
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