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https://issues.apache.org/jira/browse/HDFS-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13417733#comment-13417733
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Todd Lipcon commented on HDFS-2617:
-----------------------------------
bq. The KSSL is required to use weak encryption. It should not be used in
secure deployments except as a compatibility hack.
I'm not clear what you're saying here, Owen. You're saying SPNEGO should not be
used except as a compat hack? Or KSSL shouldn't be used except as a compat hack?
I'm not sure why encryption is being mentioned here, since most of our RPC and
data transfer is not encrypted by default. So I don't see any reason that the
fsimage transfer should be the one place where encryption is necessary, instead
of simple authentication.
> 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
> Components: security
> Reporter: Jakob Homan
> Assignee: Jakob Homan
> Fix For: 2.1.0-alpha
>
> Attachments: HDFS-2617-a.patch, HDFS-2617-b.patch,
> HDFS-2617-branch-1.patch, HDFS-2617-config.patch, HDFS-2617-trunk.patch,
> HDFS-2617-trunk.patch, HDFS-2617-trunk.patch, HDFS-2617-trunk.patch,
> hdfs-2617-1.1.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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