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https://issues.apache.org/jira/browse/HADOOP-15996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16727824#comment-16727824
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Bolke de Bruin commented on HADOOP-15996:
-----------------------------------------
[~eyang] thanks for the stack trace. I'm trying to setup my own full testing
env, but currently being on a low bandwidth connection makes this a bit
challenge.
Still this remains suspicious: KerberosName (and HadoopKerberosName) start out
with "null" rules. Obviously, in your environment these get set somewhere.
This either happens by UserGroupInformation.setConfiguration,
HadoopKerberosName.setConfiguration or (Hadoop)KerberosName.setRules . There is
no other way as there is no explicit mapping from
"hadoop.security.auth_to_local" to "kerberos.name.rules" otherwise.
I'll look into your suggestion in the meantime.
> Plugin interface to support more complex usernames in Hadoop
> ------------------------------------------------------------
>
> Key: HADOOP-15996
> URL: https://issues.apache.org/jira/browse/HADOOP-15996
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Reporter: Eric Yang
> Assignee: Bolke de Bruin
> Priority: Major
> Attachments: 0001-HADOOP-15996-Make-auth-to-local-configurable.patch,
> 0001-Simple-trial-of-using-krb5.conf-for-auth_to_local-ru.patch,
> 0002-HADOOP-15996-Make-auth-to-local-configurable.patch,
> 0003-HADOOP-15996-Make-auth-to-local-configurable.patch
>
>
> Hadoop does not allow support of @ character in username in recent security
> mailing list vote to revert HADOOP-12751. Hadoop auth_to_local rule must
> match to authorize user to login to Hadoop cluster. This design does not
> work well in multi-realm environment where identical username between two
> realms do not map to the same user. There is also possibility that lossy
> regex can incorrectly map users. In the interest of supporting multi-realms,
> it maybe preferred to pass principal name without rewrite to uniquely
> distinguish users. This jira is to revisit if Hadoop can support full
> principal names without rewrite and provide a plugin to override Hadoop's
> default implementation of auth_to_local for multi-realm use case.
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