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https://issues.apache.org/jira/browse/HADOOP-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12546837
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Tsz Wo (Nicholas), SZE commented on HADOOP-2229:
------------------------------------------------
In UnixUserGroupInformation.equals(...), it is better to do set comparison for
the group array since we don't care ordering. For example,
{code}
String [] a = ...
String [] b = ...
return a == b || new TreeSet<String>(Arrays.asList(a)).equals(new
TreeSet<String>(Arrays.asList(b)));
{code}
> Provide a simple login implementation
> -------------------------------------
>
> Key: HADOOP-2229
> URL: https://issues.apache.org/jira/browse/HADOOP-2229
> Project: Hadoop
> Issue Type: New Feature
> Affects Versions: 0.15.0
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Hairong Kuang
> Fix For: 0.16.0
>
> Attachments: ugi.patch, ugi1.patch, ugi2.patch
>
>
> Give a simple implementation of HADOOP-1701. Hadoop clients are assumed to
> be started within a Unix-like network which provides user and group
> management. This implementation read user information from the OS and send
> them to the NameNode in plaintexts through RPC (see also HADOOP-2184).
> NameNode trusts all information given and uses them for permission checking.
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