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https://issues.apache.org/jira/browse/YARN-4006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16197703#comment-16197703
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Subru Krishnan commented on YARN-4006:
--------------------------------------

[~gss2002], [~aw], [~lmccay], is this still a problem? If so, are we on track 
for 2.9.0 (27th Oct)? Thanks!

> YARN ATS Alternate Kerberos HTTP Authentication Changes
> -------------------------------------------------------
>
>                 Key: YARN-4006
>                 URL: https://issues.apache.org/jira/browse/YARN-4006
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: security, timelineserver
>    Affects Versions: 2.5.0, 2.6.0, 2.7.0, 2.5.1, 2.6.1, 2.8.0, 2.7.1, 2.7.2
>            Reporter: Greg Senia
>            Priority: Blocker
>         Attachments: YARN-4006-branch-trunk.patch, 
> YARN-4006-branch2.6.0.patch, sample-ats-alt-auth.patch
>
>
> When attempting to use The Hadoop Alternate Authentication Classes. They do 
> not exactly work with what was built with YARN-1935.
> I went ahead and made the following changes to support using a Custom 
> AltKerberos DelegationToken custom class.
> Changes to: TimelineAuthenticationFilterInitializer.class
> {code}
>    String authType = filterConfig.get(AuthenticationFilter.AUTH_TYPE);
>     LOG.info("AuthType Configured: "+authType);
>     if (authType.equals(PseudoAuthenticationHandler.TYPE)) {
>       filterConfig.put(AuthenticationFilter.AUTH_TYPE,
>           PseudoDelegationTokenAuthenticationHandler.class.getName());
>         LOG.info("AuthType: PseudoDelegationTokenAuthenticationHandler");
>     } else if (authType.equals(KerberosAuthenticationHandler.TYPE) || 
> (UserGroupInformation.isSecurityEnabled() && 
> conf.get("hadoop.security.authentication").equals(KerberosAuthenticationHandler.TYPE)))
>  {
>       if (!(authType.equals(KerberosAuthenticationHandler.TYPE))) {
>         filterConfig.put(AuthenticationFilter.AUTH_TYPE,
>           authType);
>         LOG.info("AuthType: "+authType);
>       } else {
>         filterConfig.put(AuthenticationFilter.AUTH_TYPE,
>           KerberosDelegationTokenAuthenticationHandler.class.getName());
>         LOG.info("AuthType: KerberosDelegationTokenAuthenticationHandler");
>       } 
>       // Resolve _HOST into bind address
>       String bindAddress = conf.get(HttpServer2.BIND_ADDRESS);
>       String principal =
>           filterConfig.get(KerberosAuthenticationHandler.PRINCIPAL);
>       if (principal != null) {
>         try {
>           principal = SecurityUtil.getServerPrincipal(principal, bindAddress);
>         } catch (IOException ex) {
>           throw new RuntimeException(
>               "Could not resolve Kerberos principal name: " + ex.toString(), 
> ex);
>         }
>         filterConfig.put(KerberosAuthenticationHandler.PRINCIPAL,
>             principal);
>       }
>     }
>  {code}



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