[jira] [Commented] (HADOOP-10895) HTTP KerberosAuthenticator fallback should have a flag to disable it

["Yongjun Zhang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-10895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14267268#comment-14267268 ] 

Yongjun Zhang commented on HADOOP-10895:
----------------------------------------

HI [~rkanter],

About the test you helped with:
{quote}
The idea would be that Oozie uses KerberosAuthenticator even in a non-secure cluster, relying on the fallback behavior. With the patch, that should now fail because the fallback is disabled by default.
{quote}
What we observed is that Oozie uses KerberosAuthenticator in a non-secure cluster and succeeds, so it DOESN"T seem to need the fallback.

However, there are other use cases that count on the fallback. As an example, with the patch, I had to fix quite some tests that fail if not allowing fallback. Right now the problem is that we don't have a real use case that count on the fallback to test out the fix.

I wonder if it makes sense to commit the patch such that the cases that need the fallback has to enable the fallback first?

Thanks.






> HTTP KerberosAuthenticator fallback should have a flag to disable it
> --------------------------------------------------------------------
>
>                 Key: HADOOP-10895
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10895
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.4.1
>            Reporter: Alejandro Abdelnur
>            Assignee: Yongjun Zhang
>            Priority: Blocker
>         Attachments: HADOOP-10895.001.patch, HADOOP-10895.002.patch, HADOOP-10895.003.patch, HADOOP-10895.003v1.patch, HADOOP-10895.003v2.patch, HADOOP-10895.003v2improved.patch, HADOOP-10895.004.patch, HADOOP-10895.005.patch, HADOOP-10895.006.patch, HADOOP-10895.007.patch, HADOOP-10895.008.patch, HADOOP-10895.009.patch
>
>
> Per review feedback in HADOOP-10771, {{KerberosAuthenticator}} and the delegation token version coming in with HADOOP-10771 should have a flag to disable fallback to pseudo, similarly to the one that was introduced in Hadoop RPC client with HADOOP-9698.



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