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https://issues.apache.org/jira/browse/HADOOP-14998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16227316#comment-16227316
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Robert Kanter commented on HADOOP-14998:
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I'm fine with waiting on this for later; I mostly wanted to get a discussion
going on this given that we have so many external projects using it.
> Make AuthenticationFilter @Public
> ---------------------------------
>
> Key: HADOOP-14998
> URL: https://issues.apache.org/jira/browse/HADOOP-14998
> Project: Hadoop Common
> Issue Type: Sub-task
> Affects Versions: 3.0.0
> Reporter: Robert Kanter
> Assignee: Bharat Viswanadham
>
> {{org.apache.hadoop.security.authentication.server.AuthenticationFilter}} is
> currently marked as {{\@Private}} and {{\@Unstable}}.
> {code:java}
> @InterfaceAudience.Private
> @InterfaceStability.Unstable
> public class AuthenticationFilter implements Filter {
> {code}
> However, many other projects (e.g. Oozie, Hive, Solr, HBase, etc) have been
> using it for quite some time without having any compatibility issues AFAIK.
> It doesn't seem to have had any breaking changes in quite some time. On top
> of that, it implements {{javax.servlet.Filter}}, so it can't change too
> widely anyway. {{AuthenticationFilter}} provides a lot of useful code for
> dealing with tokens, Kerberos, etc, and we should encourage related projects
> to re-use this code instead of rolling their own.
> I propose we change it to {{\@Public}} and {{\@Evolving}}.
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