Circular initialization between UserGroupInformation and KerberosName
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Key: HADOOP-6913
URL: https://issues.apache.org/jira/browse/HADOOP-6913
Project: Hadoop Common
Issue Type: Bug
Reporter: Kan Zhang
Assignee: Kan Zhang
If the first call to UGI is UGI.setConfiguration(conf), it will try to
initialize UGI class. During this initialization, the code calls
KerberosName.setConfiguration(). KerberosName's static initializer will in turn
call UGI.isSecurityEnabled(). Since UGI hasn't been completely initialized yet,
isSecurityEnabled() will re-initialize UGI with a DEFAULT conf. As a result,
the original conf used in UGI.setConfiguration(conf) will be overwritten by the
DEFAULT conf.
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