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https://issues.apache.org/jira/browse/HDFS-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13198026#comment-13198026
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Devaraj Das commented on HDFS-2617:
-----------------------------------
Jakob, I should have asked this before .. If you consider a situation where
there're multiple clusters some running a version of hadoop with spnego, and
some without this (kerbssl), how would the distcp jobs that copy data between
these clusters work?
I've seen this usecase quite common in Yahoo! (where not all clusters are
upgraded in lock-step)
> Replaced Kerberized SSL for image transfer and fsck with SPNEGO-based solution
> ------------------------------------------------------------------------------
>
> Key: HDFS-2617
> URL: https://issues.apache.org/jira/browse/HDFS-2617
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Jakob Homan
> Assignee: Jakob Homan
> Attachments: HDFS-2617-a.patch
>
>
> The current approach to secure and authenticate nn web services is based on
> Kerberized SSL and was developed when a SPNEGO solution wasn't available. Now
> that we have one, we can get rid of the non-standard KSSL and use SPNEGO
> throughout. This will simplify setup and configuration. Also, Kerberized
> SSL is a non-standard approach with its own quirks and dark corners
> (HDFS-2386).
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