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https://issues.apache.org/jira/browse/HDFS-3699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved HDFS-3699.
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Resolution: Won't Fix
Using KSSL is strongly deprecated and should be avoided in secure clusters.
> HftpFileSystem should try both KSSL and SPNEGO when authentication is required
> ------------------------------------------------------------------------------
>
> Key: HDFS-3699
> URL: https://issues.apache.org/jira/browse/HDFS-3699
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: eric baldeschwieler
>
> See discussion in HDFS-2617 (Replaced Kerberized SSL for image transfer and
> fsck with SPNEGO-based solution).
> To handle the transition from Hadoop1.0 systems running KSSL authentication
> to Hadoop systems running SPNEGO, it would be good to fix the client in both
> 1 and 2 to try SPNEGO and then fall back to try KSSL.
> This will allow organizations that are running a lot of Hadoop 1.0 to
> gradually transition over, without needing to convert all clusters at the
> same time. They would first need to update their 1.0 HFTP clients (and
> 2.0/0.23 if they are already running those) and then they could copy data
> between clusters without needing to move all clusters to SPNEGO in a big bang.
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